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

21391805 (number)

21391805 is an odd 8-digits composite number following 21391804 and preceding 21391806. In scientific notation, it is written as 2.1391805 × 10^7. The sum of its digits is 29. It has a total of 2 prime factors and 4 positive divisors. There are 17113440 positive integers (up to 21391805) that are relatively prime to 21391805.

Interesting facts

21391805 has 4 divisors, whose sum is 25670172
The reverse of 21391805 is 50819312
Previous prime number is 5

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 29
Digital Root 2

Name

Name	twenty-one million three hundred ninety-one thousand eight hundred five

Notation

Scientific notation	2.1391805 × 10^7
Engineering notation	2.1391805 × 10^6

Prime Factorization of 21391805

Prime Factorization 5 × 4278361

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21391805	Product of the distinct prime numbers

The prime factorization of 21391805 is 5 × 4278361. Since it has a total of 2 prime factors.

Most popular turbo-numbers

9, 3, 30, 59, 916, 285, 1850, 8568, 47875, 76290, 265578, 75804, 2182677, 6485552, 2048728, 60593845, 471812170, 139994502, 2041025495, 4666996679

Basic calculations (n = 21391805)

Multiplication

n×y

n×2	42783610
n×3	64175415
n×4	85567220
n×5	106959025

Division

n÷y

n÷2	10695902.5
n÷3	7130601.6666667
n÷3	5347951.25
n÷5	4278361

Exponentiation

n^y

n²	457609321158025
n³	9.7890893643948E+21
n⁴	2.0940629081071E+29
n⁵	4.479578538796E+36

Nth Root

^y√n

²√n	4625.1275658083
³√n	277.59766602555
⁴√n	68.008290419686
⁵√n	29.24485592925

Divisors of 21391805

1, 5, 4278361, 21391805

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	-21391804	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 21391805 can be divided by 4 positive divisors. The sum of these divisors (counting 21391805) is 1, the average is 0.25.

Base conversion 21391805

Base	System	Value
2	Binary	1010001100110100110111101
3	Ternary	1111020211001002
4	Quaternary	1101212212331
5	Quinary	20434014210
6	Senary	2042300045
8	Octal	121464675
10	Decimal	21391805
12	Duodecimal	71b7625
16	Hexadecimal	14669bd
20	Vigesimal	6ddja5
36	Base36	cqi0t

Cryptographic Hash Functions

md5	c90456cfb262abfde1bad9f4daaec868
sha1	0cd433df0666b697c4086d3a24f521d254b2ba2d
sha256	6202854b4b2db450b3d0d914f5c0d5ee3d29bda7e933c3cac71bbd41c59286d3
sha512	81de0f9be0fb39f1d1d5f38dbc225160cfc4d91969695913410ad1a026154583b44eaf77ebb94a3675f28bc72edd374c8256689e953cbfcace432865d8ea0a9b
ripemd-160	dd727cdec304738e20fc106d8f3257d3d1aa26ae

21391805 as geometric shapes

Circle

Radius = n

Diameter	42783610
Circumference	134408674.87005
Area	1.4376220815643E+15

Sphere

Radius = n

Volume	4.1004441643356E+22
Surface area	5.7504883262571E+15
Circumference	134408674.87005

Square

Length = n

Perimeter	85567220
Area	457609321158025
Diagonal	30252580.754641

Cube

Length = n

Surface area	2745655926948150
Volume	9.7890893643948E+21
Space diagonal	37051693.125606

Equilateral Triangle

Length = n

Perimeter	64175415
Area	1.981506485657E+14
Altitude	18525846.562803

Triangular Pyramid

Length = n

Surface area	1.981506485657E+14
Volume	1.1536552452008E+21
Height	10084193.58488