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

21081981 (number)

21081981 is an odd 8-digits composite number following 21081980 and preceding 21081982. In scientific notation, it is written as 2.1081981 × 10^7. The sum of its digits is 30. It has a total of 2 prime factors and 4 positive divisors. There are 14054652 positive integers (up to 21081981) that are relatively prime to 21081981.

Interesting facts

21081981 has 4 divisors, whose sum is 28109312
The reverse of 21081981 is 18918012
Previous prime number is 3

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 30
Digital Root 3

Name

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

Notation

Scientific notation	2.1081981 × 10^7
Engineering notation	2.1081981 × 10^6

Prime Factorization of 21081981

Prime Factorization 3 × 7027327

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21081981	Product of the distinct prime numbers

The prime factorization of 21081981 is 3 × 7027327. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 8, 41, 94, 295, 985, 4316, 8764, 36012, 62708, 767657, 293926, 9965698, 6523303, 23928729, 45110868, 395230538, 633444881, 1711985488, 2401860400

Basic calculations (n = 21081981)

Multiplication

n×y

n×2	42163962
n×3	63245943
n×4	84327924
n×5	105409905

Division

n÷y

n÷2	10540990.5
n÷3	7027327
n÷3	5270495.25
n÷5	4216396.2

Exponentiation

n^y

n²	444449922884361
n³	9.3698848296996E+21
n⁴	1.9753573395191E+29
n⁵	4.1644445899953E+36

Nth Root

^y√n

²√n	4591.5118425198
³√n	276.25096632955
⁴√n	67.760695410539
⁵√n	29.159648430799

Divisors of 21081981

1, 3, 7027327, 21081981

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	-21081980	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 21081981 can be divided by 4 positive divisors. The sum of these divisors (counting 21081981) is 1, the average is 0.25.

Base conversion 21081981

Base	System	Value
2	Binary	1010000011010111101111101
3	Ternary	1110200002001010
4	Quaternary	1100122331331
5	Quinary	20344110411
6	Senary	2031505433
8	Octal	120327575
10	Decimal	21081981
12	Duodecimal	7088279
16	Hexadecimal	141af7d
20	Vigesimal	6bf4j1
36	Base36	cjuyl

Cryptographic Hash Functions

md5	64bf24e4605e7df1c69544fd0697ae91
sha1	7ff24bcfdd6aa1d83c74e93d6740ac045443b02c
sha256	e3c05a7486eccca59e8b0bdb0af4773b1262dbcebba45633d911866d5588f372
sha512	83546d1efba00f8e93f3734712ae6f1be53be091424b7128697586a0bb9c6bbeb8ebf3839d6d3f53de295639a3dab254d9c4913e3baac49d127117aebb3606c0
ripemd-160	3831fba83f89058558f7154fd96f9d6425053177

21081981 as geometric shapes

Circle

Radius = n

Diameter	42163962
Circumference	132461993.26544
Area	1.3962806126221E+15

Sphere

Radius = n

Volume	3.9248481794622E+22
Surface area	5.5851224504882E+15
Circumference	132461993.26544

Square

Length = n

Perimeter	84327924
Area	444449922884361
Diagonal	29814423.451892

Cube

Length = n

Surface area	2666699537306166
Volume	9.3698848296996E+21
Space diagonal	36515062.216202

Equilateral Triangle

Length = n

Perimeter	63245943
Area	1.9245246196395E+14
Altitude	18257531.108101

Triangular Pyramid

Length = n

Surface area	1.9245246196395E+14
Volume	1.1042515170029E+21
Height	9938141.1506306