21397905 (number)

21397905 is an odd 8-digits composite number following 21397904 and preceding 21397906. In scientific notation, it is written as 2.1397905 × 10^7. The sum of its digits is 36. It has a total of 5 prime factors and 16 positive divisors. There are 11041920 positive integers (up to 21397905) that are relatively prime to 21397905.

Interesting facts

Basic properties

Name

Name twenty-one million three hundred ninety-seven thousand nine hundred five

Notation

Scientific notation 2.1397905 × 10^7
Engineering notation 2.1397905 × 10^6

Prime Factorization of 21397905

Prime Factorization 3 × 155 × 3 × 3 × 5113

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 2377545
Product of the distinct prime numbers

The prime factorization of 21397905 is 3 × 155 × 3 × 3 × 5113. Since it has a total of 5 prime factors.

Most popular turbo-numbers

4, 1, 32, 48, 13, 903, 6705, 5634, 43718, 18115, 86844, 277679, 7982408, 2584228, 94113367, 12860728, 561874277, 368310491, 6730501311, 9640055022

Basic calculations (n = 21397905)

Multiplication

n×y
n×2 42795810
n×3 64193715
n×4 85591620
n×5 106989525

Division

n÷y
n÷2 10698952.5
n÷3 7132635
n÷3 5349476.25
n÷5 4279581

Exponentiation

ny
n2 457870338389025
n3 9.7974660031662E+21
n4 2.0964524677648E+29
n5 4.4859690742247E+36

Nth Root

y√n
2√n 4625.786960075
3√n 277.62404972455
4√n 68.013138143119
5√n 29.246523607846

Divisors of 21397905

1, 3, 9, 27, 155, 465, 1395, 4185, 5113, 15339, 46017, 138051, 792515, 2377545, 7132635, 21397905

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 -21397904
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 21397905 can be divided by 16 positive divisors. The sum of these divisors (counting 21397905) is 1, the average is 0.0625.

Base conversion 21397905

Base System Value
2 Binary 1010001101000000110010001
3 Ternary 1111021010102000
4 Quaternary 1101220012101
5 Quinary 20434213110
6 Senary 2042344213
8 Octal 121500621
10 Decimal 21397905
12 Duodecimal 71bb069
16 Hexadecimal 1468191
20 Vigesimal 6deef5
36 Base36 cqmq9

Cryptographic Hash Functions

md5 a2e56c8dc6d9bc85997075862a369206
sha1 9ca08fe3bb5f0d9e9f98d9efb1188980057283b1
sha256 8f4e9e91dea978da966100e5472c7010b01554867ab0cf23cf649f98d9a650fa
sha512 154086bbd8a00bccfa9ee5ba10625fe88347c25d7f6d76dc3c7b3b4552c9e6c946dac0ba4b4d7ae2bc4b5af7ed2bf780469fb25cbd6f601afe00c9d92fe2b68a
ripemd-160 2107071e7fbe617c9575ba48f3b4dfd45252396c

21397905 as geometric shapes

Circle

Radius = n
Diameter 42795810
Circumference 134447002.30042
Area 1.4384420913796E+15

Sphere

Radius = n
Volume 4.103952962579E+22
Surface area 5.7537683655185E+15
Circumference 134447002.30042

Square

Length = n
Perimeter 85591620
Area 457870338389025
Diagonal 30261207.457371

Cube

Length = n
Surface area 2747222030334150
Volume 9.7974660031662E+21
Space diagonal 37062258.635532

Equilateral Triangle

Length = n
Perimeter 64193715
Area 1.9826367234214E+14
Altitude 18531129.317766

Triangular Pyramid

Length = n
Surface area 1.9826367234214E+14
Volume 1.1546424415472E+21
Height 10087069.152457