21491389 (number)

21491389 is an odd 8-digits composite number following 21491388 and preceding 21491390. In scientific notation, it is written as 2.1491389 × 10^7. The sum of its digits is 37. It has a total of 2 prime factors and 4 positive divisors. There are 21170556 positive integers (up to 21491389) that are relatively prime to 21491389.

Interesting facts

Basic properties

Name

Name twenty-one million four hundred ninety-one thousand three hundred eighty-nine

Notation

Scientific notation 2.1491389 × 10^7
Engineering notation 2.1491389 × 10^6

Prime Factorization of 21491389

Prime Factorization 67 × 320767

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21491389
Product of the distinct prime numbers

The prime factorization of 21491389 is 67 × 320767. Since it has a total of 2 prime factors.

Most popular turbo-numbers

Basic calculations (n = 21491389)

Multiplication

n×y
n×2 42982778
n×3 64474167
n×4 85965556
n×5 107456945

Division

n÷y
n÷2 10745694.5
n÷3 7163796.3333333
n÷3 5372847.25
n÷5 4298277.8

Exponentiation

ny
n2 461879801149321
n3 9.9264384777427E+21
n4 2.1333295070974E+29
n5 4.5848214302208E+36

Nth Root

y√n
2√n 4635.8806067456
3√n 278.02776062857
4√n 68.087301361896
5√n 29.272033736932

Divisors of 21491389

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21491388
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21491389 can be divided by 4 positive divisors. The sum of these divisors (counting 21491389) is 1, the average is 0.25.

Base conversion 21491389

Base System Value
2 Binary 1010001111110111010111101
3 Ternary 1111102212122101
4 Quaternary 1101332322331
5 Quinary 21000211024
6 Senary 2044345101
8 Octal 121767275
10 Decimal 21491389
12 Duodecimal 7245191
16 Hexadecimal 147eebd
20 Vigesimal 6e6899
36 Base36 csmv1

Cryptographic Hash Functions

md5 4271a35d98101c70ebae67935d8578fb
sha1 ec13e5f4c743cb1ab600f2759263a442ddaa1255
sha256 cefd313ceaba79690fe547740accd61a3038d3f9917def610136c35e1faf2c4c
sha512 073fa75911cc2f234e01910cd69ea135e027fb39f5912ef7423d3a5d6dc5c3c65ec6acb319c0871565272f8d2de7c038d21551fdebc5342b95da1ae635385b52
ripemd-160 9e2ff5f889f25a7a7fbbbe2f52c3b2f5bb17148c

21491389 as geometric shapes

Circle

Radius = n
Diameter 42982778
Circumference 135034379.59568
Area 1.4510381901322E+15

Sphere

Radius = n
Volume 4.1579768263983E+22
Surface area 5.8041527605289E+15
Circumference 135034379.59568

Square

Length = n
Perimeter 85965556
Area 461879801149321
Diagonal 30393413.798036

Cube

Length = n
Surface area 2771278806895926
Volume 9.9264384777427E+21
Space diagonal 37224177.673227

Equilateral Triangle

Length = n
Perimeter 64474167
Area 1.9999982064511E+14
Altitude 18612088.836613

Triangular Pyramid

Length = n
Surface area 1.9999982064511E+14
Volume 1.1698419934405E+21
Height 10131137.932679