21389 (number)

21389 is an odd 5-digits composite number following 21388 and preceding 21390. In scientific notation, it is written as 2.1389 × 10^4. The sum of its digits is 23. It has a total of 2 prime factors and 4 positive divisors. There are 21024 positive integers (up to 21389) that are relatively prime to 21389.

Interesting facts

Basic properties

Name

Name twenty-one thousand three hundred eighty-nine

Notation

Scientific notation 2.1389 × 10^4
Engineering notation 2.1389 × 10^3

Prime Factorization of 21389

Prime Factorization 73 × 293

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21389
Product of the distinct prime numbers

The prime factorization of 21389 is 73 × 293. Since it has a total of 2 prime factors.

Most popular turbo-numbers

1, 7, 35, 49, 20, 198, 5149, 2624, 94850, 28653, 991124, 740845, 3096396, 8337568, 18534086, 8617793, 906716304, 716524129, 4991554106, 6378845569

Basic calculations (n = 21389)

Multiplication

n×y
n×2 42778
n×3 64167
n×4 85556
n×5 106945

Division

n÷y
n÷2 10694.5
n÷3 7129.6666666667
n÷3 5347.25
n÷5 4277.8

Exponentiation

ny
n2 457489321
n3 9785239086869
n4 209296478829041041
n5 4.4766423856744E+21

Nth Root

y√n
2√n 146.24978632463
3√n 27.758553216573
4√n 12.093377788055
5√n 7.3457830217257

Divisors of 21389

1, 73, 293, 21389

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 -21388
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 21389 can be divided by 4 positive divisors. The sum of these divisors (counting 21389) is 1, the average is 0.25.

Base conversion 21389

Base System Value
2 Binary 101001110001101
3 Ternary 1002100012
4 Quaternary 11032031
5 Quinary 1141024
6 Senary 243005
8 Octal 51615
10 Decimal 21389
12 Duodecimal 10465
16 Hexadecimal 538d
20 Vigesimal 2d99
36 Base36 gi5

Cryptographic Hash Functions

md5 25c483880f8520828af4dba5d726d1e7
sha1 0b2ab371ae0499eed51133692b00d249451ba008
sha256 ea61c1c4748098bd43df0aadc0ecd35c32abfa575c7c6aaf71a49b7ebd3f9b0a
sha512 3ad40bdb16c4ed9cdfca3c6ff6d223320e6cbebb3ac97404324f9cd2812b9f3c05a51758362fb45fd53c56115ab0346d68cdd7c9668bf8937e01cba2abd60e82
ripemd-160 5f9641e1e1a07ebf9df95d7eafb90c03be73819b

21389 as geometric shapes

Circle

Radius = n
Diameter 42778
Circumference 134391.05053526
Area 1437245089.9494

Sphere

Radius = n
Volume 40988313638570
Surface area 5748980359.7975
Circumference 134391.05053526

Square

Length = n
Perimeter 85556
Area 457489321
Diagonal 30248.613885598

Cube

Length = n
Surface area 2744935926
Volume 9785239086869
Space diagonal 37046.834723091

Equilateral Triangle

Length = n
Perimeter 64167
Area 198098686.97305
Altitude 18523.417361545

Triangular Pyramid

Length = n
Surface area 198098686.97305
Volume 1153201485642.8
Height 10082.871295199