Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

21031987 (number)

21031987 is an odd 8-digits composite number following 21031986 and preceding 21031988. In scientific notation, it is written as 2.1031987 × 10^7. The sum of its digits is 31. It has a total of 2 prime factors and 4 positive divisors. There are 21021976 positive integers (up to 21031987) that are relatively prime to 21031987.

Interesting facts

21031987 has 4 divisors, whose sum is 21042000
The reverse of 21031987 is 78913012
Previous prime number is 2999

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 31
Digital Root 4

Name

Name	twenty-one million thirty-one thousand nine hundred eighty-seven

Notation

Scientific notation	2.1031987 × 10^7
Engineering notation	2.1031987 × 10^6

Prime Factorization of 21031987

Prime Factorization 2999 × 7013

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21031987	Product of the distinct prime numbers

The prime factorization of 21031987 is 2999 × 7013. Since it has a total of 2 prime factors.

Most popular turbo-numbers

4, 10, 97, 32, 472, 840, 399, 426, 1977, 31798, 335519, 979719, 6915267, 8905217, 52988113, 29636424, 261276465, 800863319, 8470698805, 2590234783

Basic calculations (n = 21031987)

Multiplication

n×y

n×2	42063974
n×3	63095961
n×4	84127948
n×5	105159935

Division

n÷y

n÷2	10515993.5
n÷3	7010662.3333333
n÷3	5257996.75
n÷5	4206397.4

Exponentiation

n^y

n²	442344477168169
n³	9.3033832933227E+21
n⁴	1.9566863648118E+29
n⁵	4.1153002187799E+36

Nth Root

^y√n

²√n	4586.064434785
³√n	276.03242547695
⁴√n	67.720487555724
⁵√n	29.145805402883

Divisors of 21031987

1, 2999, 7013, 21031987

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-21031986	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21031987 can be divided by 4 positive divisors. The sum of these divisors (counting 21031987) is 1, the average is 0.25.

Base conversion 21031987

Base	System	Value
2	Binary	1010000001110110000110011
3	Ternary	1110120112110111
4	Quaternary	1100032300303
5	Quinary	20341010422
6	Senary	2030442151
8	Octal	120166063
10	Decimal	21031987
12	Duodecimal	7063357
16	Hexadecimal	140ec33
20	Vigesimal	6b8jj7
36	Base36	cisdv

Cryptographic Hash Functions

md5	e9f3dd01c2b5fcbb6374fece7f13bd93
sha1	5c73f172b6e559c13ebf9b120a7b1fa15f0b7aa5
sha256	797caf91f280602c77baf27e411084d9d3ce83c57098638b6c1fa0b4a0464274
sha512	d7c2852493ba6411c186f2846f23bf4f9d6a04ef3340958164942cc8cbd1acded42c48fd26bc5a750401a336a79babc87fa50cc2411aebb6cb86e25af59a1c83
ripemd-160	9a603ec30695823830b72e6adc8549109dd63f99

21031987 as geometric shapes

Circle

Radius = n

Diameter	42063974
Circumference	132147871.69919
Area	1.3896661598275E+15

Sphere

Radius = n

Volume	3.8969920810444E+22
Surface area	5.5586646393102E+15
Circumference	132147871.69919

Square

Length = n

Perimeter	84127948
Area	442344477168169
Diagonal	29743721.259055

Cube

Length = n

Surface area	2654066863009014
Volume	9.3033832933227E+21
Space diagonal	36428470.068128

Equilateral Triangle

Length = n

Perimeter	63095961
Area	1.9154077722569E+14
Altitude	18214235.034064

Triangular Pyramid

Length = n

Surface area	1.9154077722569E+14
Volume	1.096414235781E+21
Height	9914573.7530182