21001805 (number)

21001805 is an odd 8-digits composite number following 21001804 and preceding 21001806. In scientific notation, it is written as 2.1001805 × 10^7. The sum of its digits is 17. It has a total of 4 prime factors and 16 positive divisors. There are 15218880 positive integers (up to 21001805) that are relatively prime to 21001805.

Interesting facts

Basic properties

Name

Name twenty-one million one thousand eight hundred five

Notation

Scientific notation 2.1001805 × 10^7
Engineering notation 2.1001805 × 10^6

Prime Factorization of 21001805

Prime Factorization 5 × 11 × 383 × 997

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21001805
Product of the distinct prime numbers

The prime factorization of 21001805 is 5 × 11 × 383 × 997. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 5, 1, 50, 728, 12, 9753, 554, 25904, 32552, 413747, 757628, 8338534, 502945, 69743543, 54970273, 118839600, 887500842, 6342063666, 2932909787

Basic calculations (n = 21001805)

Multiplication

n×y
n×2 42003610
n×3 63005415
n×4 84007220
n×5 105009025

Division

n÷y
n÷2 10500902.5
n÷3 7000601.6666667
n÷3 5250451.25
n÷5 4200361

Exponentiation

ny
n2 441075813258025
n3 9.2633882202615E+21
n4 1.9454787304123E+29
n5 4.0858564927766E+36

Nth Root

y√n
2√n 4582.7726323701
3√n 275.90032194838
4√n 67.696178860923
5√n 29.137435446322

Divisors of 21001805

1, 5, 11, 55, 383, 997, 1915, 4213, 4985, 10967, 21065, 54835, 381851, 1909255, 4200361, 21001805

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21001804
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21001805 can be divided by 16 positive divisors. The sum of these divisors (counting 21001805) is 1, the average is 0.0625.

Base conversion 21001805

Base System Value
2 Binary 1010000000111011001001101
3 Ternary 1110112000001122
4 Quaternary 1100013121031
5 Quinary 20334024210
6 Senary 2030050325
8 Octal 120073115
10 Decimal 21001805
12 Duodecimal 70499a5
16 Hexadecimal 140764d
20 Vigesimal 6b54a5
36 Base36 ci53h

Cryptographic Hash Functions

md5 da4dfbca1cd3b48cef8e0061d4b04e77
sha1 26bde0281b122c74e523dbe0c544fb7725b24f5e
sha256 0f764724016ac16d26a7fbd5e2cdebfe08d04498d09b576bebf4caa39a82d405
sha512 c913de0b239f6d6b3f7c781dcd90d8cb6defeb88f94137998deed6e0c7ca98c59049c571a592e910bcaa01a0d46dc7d5cd998e29bc11aa4182226bc0264ee8b6
ripemd-160 0c4ebfb1c4db4ac04b8b52fe600d751c91814ec8

21001805 as geometric shapes

Circle

Radius = n
Diameter 42003610
Circumference 131958232.60025
Area 1.3856805346076E+15

Sphere

Radius = n
Volume 3.8802389840165E+22
Surface area 5.5427221384302E+15
Circumference 131958232.60025

Square

Length = n
Perimeter 84007220
Area 441075813258025
Diagonal 29701037.465315

Cube

Length = n
Surface area 2646454879548150
Volume 9.2633882202615E+21
Space diagonal 36376193.310654

Equilateral Triangle

Length = n
Perimeter 63005415
Area 1.9099142963817E+14
Altitude 18188096.655327

Triangular Pyramid

Length = n
Surface area 1.9099142963817E+14
Volume 1.0917007712184E+21
Height 9900345.8217717