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

21031891 (number)

21031891 is an odd 8-digits composite number following 21031890 and preceding 21031892. In scientific notation, it is written as 2.1031891 × 10^7. The sum of its digits is 25. It has a total of 2 prime factors and 4 positive divisors. There are 21016312 positive integers (up to 21031891) that are relatively prime to 21031891.

Interesting facts

21031891 has 4 divisors, whose sum is 21047472
The reverse of 21031891 is 19813012
Previous prime number is 1493

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 25
Digital Root 7

Name

Name	twenty-one million thirty-one thousand eight hundred ninety-one

Notation

Scientific notation	2.1031891 × 10^7
Engineering notation	2.1031891 × 10^6

Prime Factorization of 21031891

Prime Factorization 1493 × 14087

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21031891	Product of the distinct prime numbers

The prime factorization of 21031891 is 1493 × 14087. Since it has a total of 2 prime factors.

Most popular turbo-numbers

8, 1, 52, 21, 618, 466, 5217, 9502, 76786, 36431, 114843, 694251, 8821888, 6079014, 60940533, 47852400, 108193566, 786433067, 1668820796, 7802065667

Basic calculations (n = 21031891)

Multiplication

n×y

n×2	42063782
n×3	63095673
n×4	84127564
n×5	105159455

Division

n÷y

n÷2	10515945.5
n÷3	7010630.3333333
n÷3	5257972.75
n÷5	4206378.2

Exponentiation

n^y

n²	442340439035881
n³	9.3032558986948E+21
n⁴	1.9566506400646E+29
n⁵	4.1152062986918E+36

Nth Root

^y√n

²√n	4586.0539682825
³√n	276.03200549519
⁴√n	67.720410278457
⁵√n	29.145778795768

Divisors of 21031891

1, 1493, 14087, 21031891

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	-21031890	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 21031891 can be divided by 4 positive divisors. The sum of these divisors (counting 21031891) is 1, the average is 0.25.

Base conversion 21031891

Base	System	Value
2	Binary	1010000001110101111010011
3	Ternary	1110120112022221
4	Quaternary	1100032233103
5	Quinary	20341010031
6	Senary	2030441511
8	Octal	120165723
10	Decimal	21031891
12	Duodecimal	7063297
16	Hexadecimal	140ebd3
20	Vigesimal	6b8jeb
36	Base36	cisb7

Cryptographic Hash Functions

md5	90bf292cd1d9af0f8b5e1ce8ac6c10e1
sha1	d56711c152f08bdc0042e18d823fcd6590f98b7e
sha256	d094db10ece93fa072274a64428695b90e22bbf703598225d84f53c0ce5609d5
sha512	bf0a1f92518ea2c0ce4c826b1bc9311cc606d62c4107ff641a93a6b7fe9c648be90c850cc33935729e6a9894b4dfb3a510731500f929ff4833512484543ef726
ripemd-160	5a2979907403ae34a4dc7d53ebf2cb0912668ac9

21031891 as geometric shapes

Circle

Radius = n

Diameter	42063782
Circumference	132147268.5134
Area	1.3896534736608E+15

Sphere

Radius = n

Volume	3.8969387181074E+22
Surface area	5.5586138946432E+15
Circumference	132147268.5134

Square

Length = n

Perimeter	84127564
Area	442340439035881
Diagonal	29743585.494553

Cube

Length = n

Surface area	2654042634215286
Volume	9.3032558986948E+21
Space diagonal	36428303.791251

Equilateral Triangle

Length = n

Perimeter	63095673
Area	1.9153902866312E+14
Altitude	18214151.895625

Triangular Pyramid

Length = n

Surface area	1.9153902866312E+14
Volume	1.0963992221801E+21
Height	9914528.4981842