21491440 (number)

21491440 is an even 8-digits composite number following 21491439 and preceding 21491441. In scientific notation, it is written as 2.1491440 × 10^7. The sum of its digits is 25. It has a total of 6 prime factors and 20 positive divisors. There are 8596544 positive integers (up to 21491440) that are relatively prime to 21491440.

Interesting facts

Basic properties

Name

Name twenty-one million four hundred ninety-one thousand four hundred forty

Notation

Scientific notation 2.1491440 × 10^7
Engineering notation 2.1491440 × 10^6

Prime Factorization of 21491440

Prime Factorization 2 × 2 × 2 × 2 × 5 × 268643

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 2686430
Product of the distinct prime numbers

The prime factorization of 21491440 is 2 × 2 × 2 × 2 × 5 × 268643. Since it has a total of 6 prime factors.

Most popular turbo-numbers

1, 10, 13, 61, 793, 202, 8753, 5188, 18752, 89396, 929095, 290374, 7758098, 8485526, 24639498, 51375279, 121709312, 38446403, 1760661981, 1422811801

Basic calculations (n = 21491440)

Multiplication

n×y
n×2 42982880
n×3 64474320
n×4 85965760
n×5 107457200

Division

n÷y
n÷2 10745720
n÷3 7163813.3333333
n÷3 5372860
n÷5 4298288

Exponentiation

ny
n2 461881993273600
n3 9.92650914552E+21
n4 2.1333497571039E+29
n5 4.5848758303814E+36

Nth Root

y√n
2√n 4635.8861073154
3√n 278.02798055238
4√n 68.087341755391
5√n 29.27204762968

Divisors of 21491440

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268643, 537286, 1074572, 1343215, 2149144, 2686430, 4298288, 5372860, 10745720, 21491440

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21491439
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21491440 can be divided by 20 positive divisors. The sum of these divisors (counting 21491440) is 1, the average is 0.05.

Base conversion 21491440

Base System Value
2 Binary 1010001111110111011110000
3 Ternary 1111102212201021
4 Quaternary 1101332323300
5 Quinary 21000211230
6 Senary 2044345224
8 Octal 121767360
10 Decimal 21491440
12 Duodecimal 7245214
16 Hexadecimal 147eef0
20 Vigesimal 6e68c0
36 Base36 csmwg

Cryptographic Hash Functions

md5 7d1b06022599397266da76ed6e0b73fb
sha1 55ce1b8257f5aa5b7526fa4b909cce3ac32b89a6
sha256 4f57ef71252e72328f6f6cfaea2be2410f979b870fbced743dbbfa5b5bdbca71
sha512 ad0a365ed218baa4a31c76cfb5016b3801a09942983920bf9e9bcd98c0f237d9a54774b17ba4fae3fb9c88148746bbab84c20434913fbbc49ee3366ac74fdc95
ripemd-160 433fec039bf0428fd9703867b813f66df1f1cf13

21491440 as geometric shapes

Circle

Radius = n
Diameter 42982880
Circumference 135034700.03813
Area 1.4510450768938E+15

Sphere

Radius = n
Volume 4.1580064276477E+22
Surface area 5.804180307575E+15
Circumference 135034700.03813

Square

Length = n
Perimeter 85965760
Area 461881993273600
Diagonal 30393485.922928

Cube

Length = n
Surface area 2771291959641600
Volume 9.92650914552E+21
Space diagonal 37224266.007818

Equilateral Triangle

Length = n
Perimeter 64474320
Area 2.0000076986277E+14
Altitude 18612133.003909

Triangular Pyramid

Length = n
Surface area 2.0000076986277E+14
Volume 1.1698503217179E+21
Height 10131161.974309