21388 (number)

21388 is an even 5-digits composite number following 21387 and preceding 21389. In scientific notation, it is written as 2.1388 × 10^4. The sum of its digits is 22. It has a total of 3 prime factors and 6 positive divisors. There are 10692 positive integers (up to 21388) that are relatively prime to 21388.

Interesting facts

Basic properties

Name

Name twenty-one thousand three hundred eighty-eight

Notation

Scientific notation 2.1388 × 10^4
Engineering notation 2.1388 × 10^3

Prime Factorization of 21388

Prime Factorization 2 × 2 × 5347

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 10694
Product of the distinct prime numbers

The prime factorization of 21388 is 2 × 2 × 5347. Since it has a total of 3 prime factors.

Most popular turbo-numbers

3, 4, 47, 91, 530, 641, 8990, 4013, 81817, 48539, 850456, 78169, 2287924, 2413988, 25871684, 66424602, 575536164, 199153080, 8856524629, 5037793856

Basic calculations (n = 21388)

Multiplication

n×y
n×2 42776
n×3 64164
n×4 85552
n×5 106940

Division

n÷y
n÷2 10694
n÷3 7129.3333333333
n÷3 5347
n÷5 4277.6

Exponentiation

ny
n2 457446544
n3 9783866683072
n4 209257340617543936
n5 4.475596001128E+21

Nth Root

y√n
2√n 146.24636747626
3√n 27.758120611249
4√n 12.093236435142
5√n 7.3457143329567

Divisors of 21388

1, 2, 4, 5347, 10694, 21388

6 divisors

τ Total Divisors 6
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21387
Sum of the proper positive divisors of n
A Arithmetic Mean 0.16666666666667
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 6
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21388 can be divided by 6 positive divisors. The sum of these divisors (counting 21388) is 1, the average is 0.16666666666667.

Base conversion 21388

Base System Value
2 Binary 101001110001100
3 Ternary 1002100011
4 Quaternary 11032030
5 Quinary 1141023
6 Senary 243004
8 Octal 51614
10 Decimal 21388
12 Duodecimal 10464
16 Hexadecimal 538c
20 Vigesimal 2d98
36 Base36 gi4

Cryptographic Hash Functions

md5 00e53a7bf746f90a6700232281a0a6d0
sha1 2120ee5c6e895452a466ee23f64da639016cc846
sha256 d09c512f9608b6f52e6950b729f4af13236da39bdc6041c2d4bc2d1c36dd0436
sha512 47e8e199b9ba6796be1e96d2fcf5c6e85185a6cb5cfbf3ddb30efbfa0404e6fb9aa3fc3065e8e21cd640f7a07f6d03b516287212f2a569f5942638b00f3cdb62
ripemd-160 c2a1016a96a4ad97a4479c8c5c13a38b941bd187

21388 as geometric shapes

Circle

Radius = n
Diameter 42776
Circumference 134384.76734996
Area 1437110702.0404

Sphere

Radius = n
Volume 40982564926988
Surface area 5748442808.1618
Circumference 134384.76734996

Square

Length = n
Perimeter 85552
Area 457446544
Diagonal 30247.199672036

Cube

Length = n
Surface area 2744679264
Volume 9783866683072
Space diagonal 37045.102672283

Equilateral Triangle

Length = n
Perimeter 64164
Area 198080163.9887
Altitude 18522.551336142

Triangular Pyramid

Length = n
Surface area 198080163.9887
Volume 1153039746304.2
Height 10082.399890679