21989

Number 21989 is an odd five-digits composite number and natural number following 21988 and preceding 21990.

Properties of the number 21989

Nominal	21989
Cardinal	twenty-one thousand nine hundred eighty-nine
Cardinal twenty-one thousand nine hundred eighty-nine
Ordinal	21,989th
Number of digits	5
Sum of digits	29
Product of digits	1296
Number parity	Odd

Previous number is 21988

Next number is 21990

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Prime Factorization of 21989

Prime factorization	11 x 1999
Prime factors	11, 1999
Number of distinct prime factors ω(n)	2
Total number of prime factors Ω(n)	2
Sum of prime factors	2010
Product of prime factors	21989

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Divisors of 21989

List of proper divisors	1, 11, 1999
List of all dividers	1, 11, 1999, 21989
Number of divisors d(n)	4
Sum of all divisors σ(n)	24000
Aliquot sum	2011
21989 is a deficient number , since it is larger than the sum of its proper divisors (2011). Its deficiency is 19978.

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Prime numbers

Is 21989 a prime number?	No
Is 21989 a semiprime number?	Yes
Is 21989 a Chen prime number?	No
Is 21989 a Mersenne prime number?	No

Previous prime is 21977

Next prime is 21991

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Sequences

Is 21989 a Catalan number?	No
Is 21989 a Fibonacci number?	No
Is 21989 a Idoneal number?	No

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Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.

21989 is not a Happy number

21989 is not a Humble number

21989 is not a Münchhausen number

21989 is not a Perfect number

21989 is not a Perfect square

21989 is not a Palindrome

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Numeric Bases of 21989

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.

Base	System	Value
2	Binary	101010111100101₂
3	Ternary	1010011102₃
4	Quaternary	11113211₄
5	Quinary	1200424₅
6	Senary	245445₆
7	Septenary	121052₇
8	Octal	52745₈
9	Nonary	33142₉
10	Decimal	21989
12	Duodecimal	10885₁₂
16	Hexadecimal	55e5₁₆
20	Vigesimal	2ej9₂₀
36	Base36	gyt₃₆
60	Sexagesimal	66T₆₀

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Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.

Square of 21989 (n²)	483516121
Cube of 21989 (n³)	10632035984669
Square root of 21989	148.28688411319
Natural Logarithm (ln) of 21989	9.9982976072988
Decimal Logarithm (log) of 21989	4.3422054792763

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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.

Sine of 21989	-0.83767785528326
Cosecant of 21989	-1.1937763350111
Cosine of 21989	-0.54616463705374
Secant of 21989	-1.8309497396141
Tangent of 21989	1.5337460510114
Cotangent of 21989	0.65199841873468

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Number parity

Parity is the property of an integer of whether it is even or odd.

Is 21989 an Even Number?

Is 21989 an Odd Number?

Yes, the number 21989 is an odd number.

Total number of all odd numbers from 1 to 21989 is 10995

Sum of all the odd numbers from 1 to 21989 are 120890025

The sum of all odd numbers is a perfect square: 120890025 = 10995

An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.

Previous odd number is 21987

Next odd number is 21991

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Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".

The spelling of 21989 in words is "twenty-one thousand nine hundred eighty-nine", meaning that:

21989 is not an aban number (as it contains the letter a)

21989 is not an eban number (as it contains the letter e)

21989 is not an iban number (as it contains the letter i)

21989 is not an oban number (as it contains the letter o)

21989 is not a tban number (as it contains the letter t)

21989 is not an uban number (as it contains the letter u)

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Numeral systems

How to write 21989 in other number systems?

Bengali numerals	২১৯৮৯
Eastern Arabic numerals	٢١٬٩٨٩
Hieroglyphs numeralsused in Ancient Egypt	𓂭𓂭𓆼𓍪𓎍𓐂
Khmer numerals	២១៩៨៩
Japanese numerals	二万千九百八十九
Roman numerals	n/a
Thai numerals	๒๑๙๘๙

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Translation

How do you say 21989 in 38 different languages?

Arabic	واحد و عشرون ألف و تسعة مائة و تسعة و ثمانون
Croatian	dvadeset i jedna tisuća devetsto osamdeset i devet
Czech	dvacet jedna tisíc devět set osmdesát devět
Danish	en og tyve tusinde ni hundrede ni og firs
Dutch	éénentwintigduizend negenhonderdnegenentachtig
Estonian	akpe blaeve vɔ ɖekɛ alafa asieke blaenyi vɔ asieke
Faroese	tjúgoeitt tusin og níggjuhundraðogáttatiníggju
Filipino	dalawáng pû’t isáng libó’t siyám na daán at walóng pû’t siyám
Finnish	kaksikymmentäyksituhattayhdeksänsataakahdeksankymmentäyhdeksän
French	vingt et un mille neuf cent quatre-vingt-neuf
Greek	είκοσι μία χίλιάδες εννιακόσια ογδόντα εννέα
German	einundzwanzigtausendneunhundertneunundachtzig
Hebrew	עשרים ואחד אלף תשע מאות שמונים ותשע
Hindi	इक्कीस हज़ार नौ सौ नवासी
Hungarian	huszonegyezerkilencszáznyolcvankilenc
Icelandic	tuttugu og eitt þúsund og níuhundrað og áttatíu og níu
Indonesian	dua puluh satu ribu sembilan ratus delapan puluh sembilan
Italian	ventunomilanovecentoottantanove
Japanese	二万千九百八十九
Korean	이만 천구백팔십구
Latvian	divdesmit viens tūkstoši deviņsimt astoņdesmit deviņi
Lithuanian	dvidešimt vienas tūkstantis devyni šimtai aštuoniasdešimt devyni
Norwegian	tjueett tusen ni hundre og åttini
Persian	بیست و یک هزار و نهصد و هشتاد و نه
Polish	dwadzieścia jeden tysięcy dziewięćset osiemdziesiąt dziewięć
Portuguese	vinte e um mil novecentos e oitenta e nove
Romanian	douăzeci şi una mii nouă sute optzeci şi nouă
Russian	двадцать одна тысяча девятьсот восемьдесят девять
Serbian	двадесет и једна хиљада деветсто осамдесет и девет
Slovak	dvadsaťjedna tisíc deväťsto osemdesiatdeväť
Slovene	dvaset ena tisuću devetsto osemdeset devet
Spanish	veintiún mil novecientos ochenta y nueve
Swahili	elfu ishirini na moja, mia tisa na themanini na tisa
Swedish	tjugoentusenniohundraåttionio
Thai	สองหมื่นหนึ่งพันเก้าร้อยแปดสิบเก้า
Turkish	yirmi bir bin dokuz yüz seksen dokuz
Ukrainian	двадцять одна тисяча девʼятсот вісімдесят девʼять
Vietnamese	hai mươi mốt nghìn chín trăm tám mươi chín

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Miscellaneous

Number 21989 reversed	98912
Unicode Character	U+55E5	嗥
Unix Timestamp	Thu, 01 Jan 1970 06:06:29 +0000

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