21090905 (number)

21090905 is an odd 8-digits composite number following 21090904 and preceding 21090906. In scientific notation, it is written as 2.1090905 × 10^7. The sum of its digits is 26. It has a total of 5 prime factors and 24 positive divisors. There are 15092000 positive integers (up to 21090905) that are relatively prime to 21090905.

Interesting facts

Basic properties

Name

Name twenty-one million ninety thousand nine hundred five

Notation

Scientific notation 2.1090905 × 10^7
Engineering notation 2.1090905 × 10^6

Prime Factorization of 21090905

Prime Factorization 11 × 11 × 5 × 71 × 491

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 1917355
Product of the distinct prime numbers

The prime factorization of 21090905 is 11 × 11 × 5 × 71 × 491. Since it has a total of 5 prime factors.

Most popular turbo-numbers

3, 3, 43, 76, 427, 227, 9814, 9989, 15008, 58444, 755053, 392316, 1561026, 8070731, 20250998, 47106997, 167388501, 375536672, 9703016132, 9199035362

Basic calculations (n = 21090905)

Multiplication

n×y
n×2 42181810
n×3 63272715
n×4 84363620
n×5 105454525

Division

n÷y
n÷2 10545452.5
n÷3 7030301.6666667
n÷3 5272726.25
n÷5 4218181

Exponentiation

ny
n2 444826273719025
n3 9.381788680512E+21
n4 1.9787041379075E+29
n5 4.1732660995715E+36

Nth Root

y√n
2√n 4592.4835329046
3√n 276.28993983109
4√n 67.767865046087
5√n 29.162116668041

Divisors of 21090905

1, 5, 11, 55, 71, 121, 355, 491, 605, 781, 2455, 3905, 5401, 8591, 27005, 34861, 42955, 59411, 174305, 297055, 383471, 1917355, 4218181, 21090905

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21090904
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21090905 can be divided by 24 positive divisors. The sum of these divisors (counting 21090905) is 1, the average is 0.041666666666667.

Base conversion 21090905

Base System Value
2 Binary 1010000011101001001011001
3 Ternary 1110200112021122
4 Quaternary 1100131021121
5 Quinary 20344402110
6 Senary 2032015025
8 Octal 120351131
10 Decimal 21090905
12 Duodecimal 7091475
16 Hexadecimal 141d259
20 Vigesimal 6bg755
36 Base36 ck1uh

Cryptographic Hash Functions

md5 120a515521c099cb8c960e2289dd2684
sha1 3808837f8e89b5b80a73c8950a3e40468a98a691
sha256 5cccafedcc9eefede8fdaadd0b8430ec9f6d6b4b899edce9a5ab99a39ada9385
sha512 8707def3cf765dca2a3faec2eed10fef284457515bebcf9abcb07a86f310e3b9e9e0fe13a4c959eea8cccaa9fce05552660aa0be591ddb4871d1184990040fc9
ripemd-160 cf3127dbd3455e5398472d8ac23d2c17a94f34de

21090905 as geometric shapes

Circle

Radius = n
Diameter 42181810
Circumference 132518064.41112
Area 1.3974629536394E+15

Sphere

Radius = n
Volume 3.9298344528304E+22
Surface area 5.5898518145576E+15
Circumference 132518064.41112

Square

Length = n
Perimeter 84363620
Area 444826273719025
Diagonal 29827043.893723

Cube

Length = n
Surface area 2668957642314150
Volume 9.381788680512E+21
Space diagonal 36530519.037608

Equilateral Triangle

Length = n
Perimeter 63272715
Area 1.9261542665572E+14
Altitude 18265259.518804

Triangular Pyramid

Length = n
Surface area 1.9261542665572E+14
Volume 1.1056543992749E+21
Height 9942347.9645742