21387

Number 21387 is an odd five-digits composite number and natural number following 21386 and preceding 21388.

Properties of the number 21387

Nominal	21387
Cardinal	twenty-one thousand three hundred eighty-seven
Cardinal twenty-one thousand three hundred eighty-seven
Ordinal	21,387th
Number of digits	5
Sum of digits	21
Product of digits	336
Number parity	Odd

Previous number is 21386

Next number is 21388

Calculation was done in 0.0000519753 seconds

Prime Factorization of 21387

Prime factorization	3 x 7129
Prime factors	3, 7129
Number of distinct prime factors ω(n)	2
Total number of prime factors Ω(n)	2
Sum of prime factors	7132
Product of prime factors	21387

Calculation was done in 0.0000989437 seconds

Divisors of 21387

List of proper divisors	1, 3, 7129
List of all dividers	1, 3, 7129, 21387
Number of divisors d(n)	4
Sum of all divisors σ(n)	28520
Aliquot sum	7133
21387 is a deficient number , since it is larger than the sum of its proper divisors (7133). Its deficiency is 14254.

Calculation was done in 0.0000221729 seconds

Prime numbers

Is 21387 a prime number?	No
Is 21387 a semiprime number?	Yes
Is 21387 a Chen prime number?	No
Is 21387 a Mersenne prime number?	No

Previous prime is 21383

Next prime is 21391

Calculation was done in 0.0351469517 seconds

Sequences

Is 21387 a Catalan number?	No
Is 21387 a Fibonacci number?	No
Is 21387 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.

21387 is not a Happy number

21387 is not a Humble number

21387 is not a Münchhausen number

21387 is not a Perfect number

21387 is not a Perfect square

21387 is not a Palindrome

Calculation was done in 0.0099921227 seconds

Numeric Bases of 21387

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	101001110001011₂
3	Ternary	1002100010₃
4	Quaternary	11032023₄
5	Quinary	1141022₅
6	Senary	243003₆
7	Septenary	116232₇
8	Octal	51613₈
9	Nonary	32303₉
10	Decimal	21387
12	Duodecimal	10463₁₂
16	Hexadecimal	538b₁₆
20	Vigesimal	2d97₂₀
36	Base36	gi3₃₆
60	Sexagesimal	5uR₆₀

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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 21387 (n²)	457403769
Cube of 21387 (n³)	9782494407603
Square root of 21387	146.24294854796
Natural Logarithm (ln) of 21387	9.9705385397857
Decimal Logarithm (log) of 21387	4.3301498694327

Calculation was done in 0.0000061989 seconds

Trigonometry

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

Sine of 21387	-0.8207860076807
Cosecant of 21387	-1.2183443560712
Cosine of 21387	0.57123579159186
Secant of 21387	1.7505905874933
Tangent of 21387	-1.4368602593921
Cotangent of 21387	-0.69596190267181

Calculation was done in 0.0000197887 seconds

Number parity

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

Is 21387 an Even Number?

Is 21387 an Odd Number?

Yes, the number 21387 is an odd number.

Total number of all odd numbers from 1 to 21387 is 10694

Sum of all the odd numbers from 1 to 21387 are 114361636

The sum of all odd numbers is a perfect square: 114361636 = 10694

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 21385

Next odd number is 21389

Calculation was done in 0.0000069141 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 21387 in words is "twenty-one thousand three hundred eighty-seven", meaning that:

21387 is not an aban number (as it contains the letter a)

21387 is not an eban number (as it contains the letter e)

21387 is not an iban number (as it contains the letter i)

21387 is not an oban number (as it contains the letter o)

21387 is not a tban number (as it contains the letter t)

21387 is not an uban number (as it contains the letter u)

Calculation was done in 0.0000019073 seconds

Numeral systems

How to write 21387 in other number systems?

Bengali numerals	২১৩৮৭
Eastern Arabic numerals	٢١٬٣٨٧
Hieroglyphs numeralsused in Ancient Egypt	𓂭𓂭𓆼𓍤𓎍𓐀
Khmer numerals	២១៣៨៧
Japanese numerals	二万千三百八十七
Roman numerals	n/a
Thai numerals	๒๑๓๘๗

Calculation was done in 0.0001549721 seconds

Translation

How do you say 21387 in 38 different languages?

Arabic	واحد و عشرون ألف و ثلاثة مائة و سبعة و ثمانون
Croatian	dvadeset i jedna tisuća tristo osamdeset i sedam
Czech	dvacet jedna tisíc tři sta osmdesát sedm
Danish	en og tyve tusinde tre hundrede syv og firs
Dutch	éénentwintigduizend driehonderdzevenentachtig
Estonian	akpe blaeve vɔ ɖekɛ alafa etɔ̃ blaenyi vɔ adre
Faroese	tjúgoeitt tusin og trýhundraðogáttatisjey
Filipino	dalawáng pû’t isáng libó’t tatlóng daán at walóng pû’t pitó
Finnish	kaksikymmentäyksituhattakolmesataakahdeksankymmentäseitsemän
French	vingt et un mille trois cent quatre-vingt-sept
Greek	είκοσι μία χίλιάδες τριακόσια ογδόντα επτά
German	einundzwanzigtausenddreihundertsiebenundachtzig
Hebrew	עשרים ואחד אלף שלוש מאות שמונים ושבע
Hindi	इक्कीस हज़ार तीन सौ सत्तासी
Hungarian	huszonegyezerháromszáznyolcvanhét
Icelandic	tuttugu og eitt þúsund og þrjúhundrað og áttatíu og sjó
Indonesian	dua puluh satu ribu tiga ratus delapan puluh tujuh
Italian	ventunomilatrecentoottantasette
Japanese	二万千三百八十七
Korean	이만 천삼백팔십칠
Latvian	divdesmit viens tūkstoši trīssimt astoņdesmit septiņi
Lithuanian	dvidešimt vienas tūkstantis trys šimtai aštuoniasdešimt septyni
Norwegian	tjueett tusen tre hundre og åttisju
Persian	بیست و یک هزار و سیصد و هشتاد و هفت
Polish	dwadzieścia jeden tysięcy trzysta osiemdziesiąt siedem
Portuguese	vinte e um mil trezentos e oitenta e sete
Romanian	douăzeci şi una mii trei sute optzeci şi şapte
Russian	двадцать одна тысяча триста восемьдесят семь
Serbian	двадесет и једна хиљада триста осамдесет и седам
Slovak	dvadsaťjedna tisíc tristo osemdesiatsedem
Slovene	dvaset ena tisuću tristo osemdeset sedem
Spanish	veintiún mil trescientos ochenta y siete
Swahili	elfu ishirini na moja, mia tatu na themanini na saba
Swedish	tjugoentusentrehundraåttiosju
Thai	สองหมื่นหนึ่งพันสามร้อยแปดสิบเจ็ด
Turkish	yirmi bir bin üç yüz seksen yedi
Ukrainian	двадцять одна тисяча триста вісімдесят сім
Vietnamese	hai mươi mốt nghìn ba trăm tám mươi bảy

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Miscellaneous

Number 21387 reversed	78312
Unicode Character	U+538B	压
Unix Timestamp	Thu, 01 Jan 1970 05:56:27 +0000

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