21505905 (number)

21505905 is an odd 8-digits composite number following 21505904 and preceding 21505906. In scientific notation, it is written as 2.1505905 × 10^7. The sum of its digits is 27. It has a total of 4 prime factors and 16 positive divisors. There are 11469600 positive integers (up to 21505905) that are relatively prime to 21505905.

Interesting facts

Basic properties

Name

Name twenty-one million five hundred five thousand nine hundred five

Notation

Scientific notation 2.1505905 × 10^7
Engineering notation 2.1505905 × 10^6

Prime Factorization of 21505905

Prime Factorization 27 × 3 × 5 × 53101

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21505905
Product of the distinct prime numbers

The prime factorization of 21505905 is 27 × 3 × 5 × 53101. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 2, 2, 15, 20, 31, 2388, 8609, 78599, 66195, 716656, 854848, 4251976, 3833706, 95689592, 58247703, 875443025, 912958756, 8046632554, 9588315388

Basic calculations (n = 21505905)

Multiplication

n×y
n×2 43011810
n×3 64517715
n×4 86023620
n×5 107529525

Division

n÷y
n÷2 10752952.5
n÷3 7168635
n÷3 5376476.25
n÷5 4301181

Exponentiation

ny
n2 462503949869025
n3 9.946566008008E+21
n4 2.1390990364445E+29
n5 4.6003260663367E+36

Nth Root

y√n
2√n 4637.4459565584
3√n 278.09034294413
4√n 68.098795558794
5√n 29.275986930354

Divisors of 21505905

1, 3, 5, 15, 27, 81, 135, 405, 53101, 159303, 265505, 796515, 1433727, 4301181, 7168635, 21505905

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 -21505904
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 21505905 can be divided by 16 positive divisors. The sum of these divisors (counting 21505905) is 1, the average is 0.0625.

Base conversion 21505905

Base System Value
2 Binary 1010010000010011101110001
3 Ternary 1111110121120000
4 Quaternary 1102002131301
5 Quinary 21001142110
6 Senary 2044540213
8 Octal 122023561
10 Decimal 21505905
12 Duodecimal 7251669
16 Hexadecimal 1482771
20 Vigesimal 6e84f5
36 Base36 csy29

Cryptographic Hash Functions

md5 56d98b3416a667fedf2733fac55b3dc7
sha1 3c863253aa0fdf399ad1ed0e50eb37290a9c425d
sha256 1e697835bac43f3748a746dc4392e70a75021e771adaa74cdbba6d1b904d8807
sha512 b54157eb2cfe73f3987f829a0f925143b1ac8eba25caa4e784e2fc67481dcbfe09b7fb9f195d82c030d067665dd15ae8fede86332125c9ad7dd8d3603771b0c6
ripemd-160 be1d71e3a6b1a0be62cb356d6636691a67a87e7f

21505905 as geometric shapes

Circle

Radius = n
Diameter 43011810
Circumference 135125586.3136
Area 1.4529990111648E+15

Sphere

Radius = n
Volume 4.1664078265605E+22
Surface area 5.8119960446592E+15
Circumference 135125586.3136

Square

Length = n
Perimeter 86023620
Area 462503949869025
Diagonal 30413942.522107

Cube

Length = n
Surface area 2775023699214150
Volume 9.946566008008E+21
Space diagonal 37249320.12275

Equilateral Triangle

Length = n
Perimeter 64517715
Area 2.0027008496861E+14
Altitude 18624660.061375

Triangular Pyramid

Length = n
Surface area 2.0027008496861E+14
Volume 1.1722140456303E+21
Height 10137980.840702