21921

Number 21921 is an odd five-digits composite number and natural number following 21920 and preceding 21922.

Properties of the number 21921

Nominal	21921
Cardinal	twenty-one thousand nine hundred twenty-one
Cardinal twenty-one thousand nine hundred twenty-one
Ordinal	21,921st
Number of digits	5
Sum of digits	15
Product of digits	36
Number parity	Odd

Previous number is 21920

Next number is 21922

Calculation was done in 0.0000348091 seconds

Prime Factorization of 21921

Prime factorization	3 x 7307
Prime factors	3, 7307
Number of distinct prime factors ω(n)	2
Total number of prime factors Ω(n)	2
Sum of prime factors	7310
Product of prime factors	21921

Calculation was done in 0.0001010895 seconds

Divisors of 21921

List of proper divisors	1, 3, 7307
List of all dividers	1, 3, 7307, 21921
Number of divisors d(n)	4
Sum of all divisors σ(n)	29232
Aliquot sum	7311
21921 is a deficient number , since it is larger than the sum of its proper divisors (7311). Its deficiency is 14610.

Calculation was done in 0.0000290871 seconds

Prime numbers

Is 21921 a prime number?	No
Is 21921 a semiprime number?	Yes
Is 21921 a Chen prime number?	No
Is 21921 a Mersenne prime number?	No

Previous prime is 21911

Next prime is 21929

Calculation was done in 0.0286540985 seconds

Sequences

Is 21921 a Catalan number?	No
Is 21921 a Fibonacci number?	No
Is 21921 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.

21921 is a Happy number

21921 is not a Humble number

21921 is not a Münchhausen number

21921 is not a Perfect number

21921 is not a Perfect square

21921 is not a Palindrome

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Numeric Bases of 21921

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	101010110100001₂
3	Ternary	1010001220₃
4	Quaternary	11112201₄
5	Quinary	1200141₅
6	Senary	245253₆
7	Septenary	120624₇
8	Octal	52641₈
9	Nonary	33056₉
10	Decimal	21921
12	Duodecimal	10829₁₂
16	Hexadecimal	55a1₁₆
20	Vigesimal	2eg1₂₀
36	Base36	gwx₃₆
60	Sexagesimal	65L₆₀

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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 21921 (n²)	480530241
Cube of 21921 (n³)	10533703412961
Square root of 21921	148.05742129323
Natural Logarithm (ln) of 21921	9.9952003604593
Decimal Logarithm (log) of 21921	4.3408603620649

Calculation was done in 0.0000040531 seconds

Trigonometry

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

Sine of 21921	-0.85911440892655
Cosecant of 21921	-1.163989323901
Cosine of 21921	0.51178357962599
Secant of 21921	1.9539509273252
Tangent of 21921	-1.6786673960005
Cotangent of 21921	-0.59571062283248

Calculation was done in 0.0000128746 seconds

Number parity

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

Is 21921 an Even Number?

Is 21921 an Odd Number?

Yes, the number 21921 is an odd number.

Total number of all odd numbers from 1 to 21921 is 10961

Sum of all the odd numbers from 1 to 21921 are 120143521

The sum of all odd numbers is a perfect square: 120143521 = 10961

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 21919

Next odd number is 21923

Calculation was done in 0.0000078678 seconds

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 21921 in words is "twenty-one thousand nine hundred twenty-one", meaning that:

21921 is not an aban number (as it contains the letter a)

21921 is not an eban number (as it contains the letter e)

21921 is not an iban number (as it contains the letter i)

21921 is not an oban number (as it contains the letter o)

21921 is not a tban number (as it contains the letter t)

21921 is not an uban number (as it contains the letter u)

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Numeral systems

How to write 21921 in other number systems?

Bengali numerals	২১৯২১
Eastern Arabic numerals	٢١٬٩٢١
Hieroglyphs numeralsused in Ancient Egypt	𓂭𓂭𓆼𓍪𓎇𓏺
Khmer numerals	២១៩២១
Japanese numerals	二万千九百二十一
Roman numerals	n/a
Thai numerals	๒๑๙๒๑

Calculation was done in 0.0000798702 seconds

Translation

How do you say 21921 in 38 different languages?

Arabic	واحد و عشرون ألف و تسعة مائة و واحد و عشرون
Croatian	dvadeset i jedna tisuća devetsto dvadeset i jedan
Czech	dvacet jedna tisíc devět set dvacet jeden
Danish	en og tyve tusinde ni hundrede en og tyve
Dutch	éénentwintigduizend negenhonderdéénentwintig
Estonian	akpe blaeve vɔ ɖekɛ alafa asieke blaeve vɔ ɖekɛ
Faroese	tjúgoeitt tusin og níggjuhundraðogtjúgoein
Filipino	dalawáng pû’t isáng libó’t siyám na daán at dalawáng pû’t isá
Finnish	kaksikymmentäyksituhattayhdeksänsataakaksikymmentäyksi
French	vingt et un mille neuf cent vingt et un
Greek	είκοσι μία χίλιάδες εννιακόσια είκοσι ένα
German	einundzwanzigtausendneunhunderteinundzwanzig
Hebrew	עשרים ואחד אלף תשע מאות עשרים ואחת
Hindi	इक्कीस हज़ार नौ सौ इक्कीस
Hungarian	huszonegyezerkilencszázhuszonegy
Icelandic	tuttugu og eitt þúsund og níuhundrað og tuttugu og einn
Indonesian	dua puluh satu ribu sembilan ratus dua puluh satu
Italian	ventunomilanovecentoventuno
Japanese	二万千九百二十一
Korean	이만 천구백이십일
Latvian	divdesmit viens tūkstoši deviņsimt divdesmit viens
Lithuanian	dvidešimt vienas tūkstantis devyni šimtai dvidešimt vienas
Norwegian	tjueett tusen ni hundre og tjueén
Persian	بیست و یک هزار و نهصد و بیست و یک
Polish	dwadzieścia jeden tysięcy dziewięćset dwadzieścia jeden
Portuguese	vinte e um mil novecentos e vinte e um
Romanian	douăzeci şi una mii nouă sute douăzeci şi unu
Russian	двадцать одна тысяча девятьсот двадцать один
Serbian	двадесет и једна хиљада деветсто двадесет и један
Slovak	dvadsaťjedna tisíc deväťsto dvadsaťjeden
Slovene	dvaset ena tisuću devetsto dvaset ena
Spanish	veintiún mil novecientos veintiuno
Swahili	elfu ishirini na moja, mia tisa na ishirini na moja
Swedish	tjugoentusenniohundratjugoen
Thai	สองหมื่นหนึ่งพันเก้าร้อยยี่สิบเอ็ด
Turkish	yirmi bir bin dokuz yüz yirmi bir
Ukrainian	двадцять одна тисяча девʼятсот двадцять один
Vietnamese	hai mươi mốt nghìn chín trăm hai mươi mốt

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Miscellaneous

Number 21921 reversed	12912
Unicode Character	U+55A1	喡
Unix Timestamp	Thu, 01 Jan 1970 06:05:21 +0000

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