Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

21491387 (number)

21491387 is an odd 8-digits composite number following 21491386 and preceding 21491388. In scientific notation, it is written as 2.1491387 × 10^7. The sum of its digits is 35. It has a total of 2 prime factors and 4 positive divisors. There are 21359376 positive integers (up to 21491387) that are relatively prime to 21491387.

Interesting facts

21491387 has 4 divisors, whose sum is 21623400
The reverse of 21491387 is 78319412
Previous prime number is 163

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 35
Digital Root 8

Name

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

Notation

Scientific notation	2.1491387 × 10^7
Engineering notation	2.1491387 × 10^6

Prime Factorization of 21491387

Prime Factorization 163 × 131849

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	21491387	Product of the distinct prime numbers

The prime factorization of 21491387 is 163 × 131849. Since it has a total of 2 prime factors.

Most popular turbo-numbers

6, 6, 76, 83, 182, 608, 7583, 5942, 5358, 20572, 862845, 15316, 8883787, 2166579, 83845390, 91891149, 907847954, 805084765, 655236952, 3252844115

Basic calculations (n = 21491387)

Multiplication

n×y

n×2	42982774
n×3	64474161
n×4	85965548
n×5	107456935

Division

n÷y

n÷2	10745693.5
n÷3	7163795.6666667
n÷3	5372846.75
n÷5	4298277.4

Exponentiation

n^y

n²	461879715183769
n³	9.9264357064642E+21
n⁴	2.1333287129824E+29
n⁵	4.5848192968917E+36

Nth Root

^y√n

²√n	4635.8803910369
³√n	278.0277520041
⁴√n	68.087299777836
⁵√n	29.272033192118

Divisors of 21491387

1, 163, 131849, 21491387

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	-21491386	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 21491387 can be divided by 4 positive divisors. The sum of these divisors (counting 21491387) is 1, the average is 0.25.

Base conversion 21491387

Base	System	Value
2	Binary	1010001111110111010111011
3	Ternary	1111102212122022
4	Quaternary	1101332322323
5	Quinary	21000211022
6	Senary	2044345055
8	Octal	121767273
10	Decimal	21491387
12	Duodecimal	724518b
16	Hexadecimal	147eebb
20	Vigesimal	6e6897
36	Base36	csmuz

Cryptographic Hash Functions

md5	c86541000ba72376c724354caeea73d0
sha1	ed2c0d0507d4143d561d882d6ab45ce50a453c3a
sha256	c1dcb067718dbc54cd5af2f5a7463c4ec23b454d7b33a13be759751f4371364a
sha512	0e34d3baaac0c21ed9f09481945daa6fab87fdc21ca3b81d7951e6c083e18f88cdd1ca13ddc42b36d153f5ec120f8c62d0164f454e4072ca5319e5fe49d204a5
ripemd-160	29f18f9c07719c3479e4a74526df49344252cf91

21491387 as geometric shapes

Circle

Radius = n

Diameter	42982774
Circumference	135034367.02931
Area	1.4510379200635E+15

Sphere

Radius = n

Volume	4.1579756655679E+22
Surface area	5.8041516802539E+15
Circumference	135034367.02931

Square

Length = n

Perimeter	85965548
Area	461879715183769
Diagonal	30393410.969609

Cube

Length = n

Surface area	2771278291102614
Volume	9.9264357064642E+21
Space diagonal	37224174.209125

Equilateral Triangle

Length = n

Perimeter	64474161
Area	1.9999978342093E+14
Altitude	18612087.104563

Triangular Pyramid

Length = n

Surface area	1.9999978342093E+14
Volume	1.1698416668422E+21
Height	10131136.98987