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

21081809 (number)

21081809 is an odd 8-digits composite number following 21081808 and preceding 21081810. In scientific notation, it is written as 2.1081809 × 10^7. The sum of its digits is 29. It has a total of 4 prime factors and 8 positive divisors. There are 18069828 positive integers (up to 21081809) that are relatively prime to 21081809.

Interesting facts

21081809 has 8 divisors, whose sum is 24585600
The reverse of 21081809 is 90818012
Previous prime number is 7

Basic properties

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

Name

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

Notation

Scientific notation	2.1081809 × 10^7
Engineering notation	2.1081809 × 10^6

Prime Factorization of 21081809

Prime Factorization 7 × 7 × 7 × 61463

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	4	Total number of prime factors
rad	Radical	430241	Product of the distinct prime numbers

The prime factorization of 21081809 is 7 × 7 × 7 × 61463. Since it has a total of 4 prime factors.

Most popular turbo-numbers

3, 9, 95, 44, 175, 990, 3049, 3169, 22073, 50692, 496203, 291400, 9811624, 8727650, 57912122, 78131995, 784944021, 425202062, 1105781307, 9254176204

Basic calculations (n = 21081809)

Multiplication

n×y

n×2	42163618
n×3	63245427
n×4	84327236
n×5	105409045

Division

n÷y

n÷2	10540904.5
n÷3	7027269.6666667
n÷3	5270452.25
n÷5	4216361.8

Exponentiation

n^y

n²	444442670712481
n³	9.3696554954104E+21
n⁴	1.9752928755004E+29
n⁵	4.1642747120361E+36

Nth Root

^y√n

²√n	4591.4931122675
³√n	276.25021505139
⁴√n	67.760557201572
⁵√n	29.15960085011

Divisors of 21081809

1, 7, 49, 343, 61463, 430241, 3011687, 21081809

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-21081808	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	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	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21081809 can be divided by 8 positive divisors. The sum of these divisors (counting 21081809) is 1, the average is 0.125.

Base conversion 21081809

Base	System	Value
2	Binary	1010000011010111011010001
3	Ternary	1110200001210202
4	Quaternary	1100122323101
5	Quinary	20344104214
6	Senary	2031504545
8	Octal	120327321
10	Decimal	21081809
12	Duodecimal	7088155
16	Hexadecimal	141aed1
20	Vigesimal	6bf4a9
36	Base36	cjutt

Cryptographic Hash Functions

md5	9d5ca405e0c5d775e3d262d24ff08edb
sha1	51821fdece4d00607aaddb2dbc16de00efa449c9
sha256	fd87d0174ba4703e616101beacbc411cc4208766f13fdeea56da3bcfa55baa27
sha512	26e9385053d8f6e4ebce59cbfd4371ef0fe7cd142dfb2837ce6750c4e4e9faac44b354ea179a359ee44134a1c4d3d73f2ebebe176e88164c59d0a1e3f5f7fafe
ripemd-160	2b52e93215bd2035a9657c1dccc998d2f6143163

21081809 as geometric shapes

Circle

Radius = n

Diameter	42163618
Circumference	132460912.55757
Area	1.3962578292522E+15

Sphere

Radius = n

Volume	3.9247521161398E+22
Surface area	5.5850313170086E+15
Circumference	132460912.55757

Square

Length = n

Perimeter	84327236
Area	444442670712481
Diagonal	29814180.207159

Cube

Length = n

Surface area	2666656024274886
Volume	9.3696554954104E+21
Space diagonal	36514764.303463

Equilateral Triangle

Length = n

Perimeter	63245427
Area	1.9244932168141E+14
Altitude	18257382.151731

Triangular Pyramid

Length = n

Surface area	1.9244932168141E+14
Volume	1.1042244896978E+21
Height	9938060.0690531