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

21081815 (number)

21081815 is an odd 8-digits composite number following 21081814 and preceding 21081816. In scientific notation, it is written as 2.1081815 × 10^7. The sum of its digits is 26. It has a total of 2 prime factors and 4 positive divisors. There are 16865448 positive integers (up to 21081815) that are relatively prime to 21081815.

Interesting facts

21081815 has 4 divisors, whose sum is 25298184
The reverse of 21081815 is 51818012
Previous prime number is 5

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 26
Digital Root 8

Name

Name	twenty-one million eighty-one thousand eight hundred fifteen

Notation

Scientific notation	2.1081815 × 10^7
Engineering notation	2.1081815 × 10^6

Prime Factorization of 21081815

Prime Factorization 5 × 4216363

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21081815	Product of the distinct prime numbers

The prime factorization of 21081815 is 5 × 4216363. Since it has a total of 2 prime factors.

Most popular turbo-numbers

2, 1, 94, 48, 66, 812, 9304, 6118, 30840, 24704, 664559, 872447, 2038744, 7625076, 1604662, 83323754, 857594433, 535550587, 3438620709, 5945535768

Basic calculations (n = 21081815)

Multiplication

n×y

n×2	42163630
n×3	63245445
n×4	84327260
n×5	105409075

Division

n÷y

n÷2	10540907.5
n÷3	7027271.6666667
n÷3	5270453.75
n÷5	4216363

Exponentiation

n^y

n²	444442923694225
n³	9.3696634953808E+21
n⁴	1.9752951242187E+29
n⁵	4.1642806379181E+36

Nth Root

^y√n

²√n	4591.4937656497
³√n	276.25024125884
⁴√n	67.760562022829
⁵√n	29.159602509907

Divisors of 21081815

1, 5, 4216363, 21081815

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	-21081814	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 21081815 can be divided by 4 positive divisors. The sum of these divisors (counting 21081815) is 1, the average is 0.25.

Base conversion 21081815

Base	System	Value
2	Binary	1010000011010111011010111
3	Ternary	1110200001210222
4	Quaternary	1100122323113
5	Quinary	20344104230
6	Senary	2031504555
8	Octal	120327327
10	Decimal	21081815
12	Duodecimal	708815b
16	Hexadecimal	141aed7
20	Vigesimal	6bf4af
36	Base36	cjutz

Cryptographic Hash Functions

md5	e37300b359e9cf56abcce098bad21d03
sha1	5b59e9989982e79ad0d546ed393ab8ec176161f1
sha256	da143773f2afd1cd0a11fd345e5c308893e335707e9068076e3e509e68acae01
sha512	535f67c9e8edfe1f849794073d239561d92160ad1cf4fb5a5be0132c9cf00a4a7c341d3cd5a864bab3694c9448a02f4e80a509b0740634a6a85b798cd3169768
ripemd-160	3cd81b2cd9fde17d6af17d97b65c6ce72d8c7fd9

21081815 as geometric shapes

Circle

Radius = n

Diameter	42163630
Circumference	132460950.25668
Area	1.3962586240177E+15

Sphere

Radius = n

Volume	3.9247554671596E+22
Surface area	5.585034496071E+15
Circumference	132460950.25668

Square

Length = n

Perimeter	84327260
Area	444442923694225
Diagonal	29814188.692441

Cube

Length = n

Surface area	2666657542165350
Volume	9.3696634953808E+21
Space diagonal	36514774.695768

Equilateral Triangle

Length = n

Perimeter	63245445
Area	1.9244943122571E+14
Altitude	18257387.347884

Triangular Pyramid

Length = n

Surface area	1.9244943122571E+14
Volume	1.1042254325033E+21
Height	9938062.8974802