21381

Number 21381 is an odd five-digits composite number and natural number following 21380 and preceding 21382.

Properties of the number 21381

Nominal	21381
Cardinal	twenty-one thousand three hundred eighty-one
Cardinal twenty-one thousand three hundred eighty-one
Ordinal	21,381st
Number of digits	5
Sum of digits	15
Product of digits	48
Number parity	Odd

Previous number is 21380

Next number is 21382

Calculation was done in 0.0000481606 seconds

Prime Factorization of 21381

Prime factorization	3 x 7127
Prime factors	3, 7127
Number of distinct prime factors ω(n)	2
Total number of prime factors Ω(n)	2
Sum of prime factors	7130
Product of prime factors	21381

Calculation was done in 0.0001308918 seconds

Divisors of 21381

List of proper divisors	1, 3, 7127
List of all dividers	1, 3, 7127, 21381
Number of divisors d(n)	4
Sum of all divisors σ(n)	28512
Aliquot sum	7131
21381 is a deficient number , since it is larger than the sum of its proper divisors (7131). Its deficiency is 14250.

Calculation was done in 0.0000319481 seconds

Prime numbers

Is 21381 a prime number?	No
Is 21381 a semiprime number?	Yes
Is 21381 a Chen prime number?	No
Is 21381 a Mersenne prime number?	No

Previous prime is 21379

Next prime is 21383

Calculation was done in 0.0475161076 seconds

Sequences

Is 21381 a Catalan number?	No
Is 21381 a Fibonacci number?	No
Is 21381 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.

21381 is a Happy number

21381 is not a Humble number

21381 is not a Münchhausen number

21381 is not a Perfect number

21381 is not a Perfect square

21381 is not a Palindrome

Calculation was done in 0.0030529499 seconds

Numeric Bases of 21381

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	101001110000101₂
3	Ternary	1002022220₃
4	Quaternary	11032011₄
5	Quinary	1141011₅
6	Senary	242553₆
7	Septenary	116223₇
8	Octal	51605₈
9	Nonary	32286₉
10	Decimal	21381
12	Duodecimal	10459₁₂
16	Hexadecimal	5385₁₆
20	Vigesimal	2d91₂₀
36	Base36	ghx₃₆
60	Sexagesimal	5uL₆₀

Calculation was done in 0.0000281334 seconds

Mathematical operations

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

Square of 21381 (n²)	457147161
Cube of 21381 (n³)	9774263449341
Square root of 21381	146.22243329941
Natural Logarithm (ln) of 21381	9.97025795617
Decimal Logarithm (log) of 21381	4.3300280135166

Calculation was done in 0.0000069141 seconds

Trigonometry

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

Sine of 21381	-0.62848220297669
Cosecant of 21381	-1.5911349522129
Cosine of 21381	0.77782396500851
Secant of 21381	1.2856379399278
Tangent of 21381	-0.80800056471623
Cotangent of 21381	-1.2376228973939

Calculation was done in 0.0000209808 seconds

Number parity

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

Is 21381 an Even Number?

Is 21381 an Odd Number?

Yes, the number 21381 is an odd number.

Total number of all odd numbers from 1 to 21381 is 10691

Sum of all the odd numbers from 1 to 21381 are 114297481

The sum of all odd numbers is a perfect square: 114297481 = 10691

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 21379

Next odd number is 21383

Calculation was done in 0.0000100136 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 21381 in words is "twenty-one thousand three hundred eighty-one", meaning that:

21381 is not an aban number (as it contains the letter a)

21381 is not an eban number (as it contains the letter e)

21381 is not an iban number (as it contains the letter i)

21381 is not an oban number (as it contains the letter o)

21381 is not a tban number (as it contains the letter t)

21381 is not an uban number (as it contains the letter u)

Calculation was done in 0.0000028610 seconds

Numeral systems

How to write 21381 in other number systems?

Bengali numerals	২১৩৮১
Eastern Arabic numerals	٢١٬٣٨١
Hieroglyphs numeralsused in Ancient Egypt	𓂭𓂭𓆼𓍤𓎍𓏺
Khmer numerals	២១៣៨១
Japanese numerals	二万千三百八十一
Roman numerals	n/a
Thai numerals	๒๑๓๘๑

Calculation was done in 0.0002179146 seconds

Translation

How do you say 21381 in 38 different languages?

Arabic	واحد و عشرون ألف و ثلاثة مائة و واحد و ثمانون
Croatian	dvadeset i jedna tisuća tristo osamdeset i jedan
Czech	dvacet jedna tisíc tři sta osmdesát jeden
Danish	en og tyve tusinde tre hundrede en og firs
Dutch	éénentwintigduizend driehonderdéénentachtig
Estonian	akpe blaeve vɔ ɖekɛ alafa etɔ̃ blaenyi vɔ ɖekɛ
Faroese	tjúgoeitt tusin og trýhundraðogáttatiein
Filipino	dalawáng pû’t isáng libó’t tatlóng daán at walóng pû’t isá
Finnish	kaksikymmentäyksituhattakolmesataakahdeksankymmentäyksi
French	vingt et un mille trois cent quatre-vingt-un
Greek	είκοσι μία χίλιάδες τριακόσια ογδόντα ένα
German	einundzwanzigtausenddreihunderteinundachtzig
Hebrew	עשרים ואחד אלף שלוש מאות שמונים ואחת
Hindi	इक्कीस हज़ार तीन सौ इक्यासी
Hungarian	huszonegyezerháromszáznyolcvanegy
Icelandic	tuttugu og eitt þúsund og þrjúhundrað og áttatíu og einn
Indonesian	dua puluh satu ribu tiga ratus delapan puluh satu
Italian	ventunomilatrecentoottantuno
Japanese	二万千三百八十一
Korean	이만 천삼백팔십일
Latvian	divdesmit viens tūkstoši trīssimt astoņdesmit viens
Lithuanian	dvidešimt vienas tūkstantis trys šimtai aštuoniasdešimt vienas
Norwegian	tjueett tusen tre hundre og åttién
Persian	بیست و یک هزار و سیصد و هشتاد و یک
Polish	dwadzieścia jeden tysięcy trzysta osiemdziesiąt jeden
Portuguese	vinte e um mil trezentos e oitenta e um
Romanian	douăzeci şi una mii trei sute optzeci şi unu
Russian	двадцать одна тысяча триста восемьдесят один
Serbian	двадесет и једна хиљада триста осамдесет и један
Slovak	dvadsaťjedna tisíc tristo osemdesiatjeden
Slovene	dvaset ena tisuću tristo osemdeset ena
Spanish	veintiún mil trescientos ochenta y uno
Swahili	elfu ishirini na moja, mia tatu na themanini na moja
Swedish	tjugoentusentrehundraåttioen
Thai	สองหมื่นหนึ่งพันสามร้อยแปดสิบเอ็ด
Turkish	yirmi bir bin üç yüz seksen bir
Ukrainian	двадцять одна тисяча триста вісімдесят один
Vietnamese	hai mươi mốt nghìn ba trăm tám mươi mốt

Calculation was done in 0.0226480961 seconds

Miscellaneous

Number 21381 reversed	18312
Unicode Character	U+5385	厅
Unix Timestamp	Thu, 01 Jan 1970 05:56:21 +0000

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