21387979 (number)

21387979 is an odd 8-digits composite number following 21387978 and preceding 21387980. In scientific notation, it is written as 2.1387979 × 10^7. The sum of its digits is 46. It has a total of 2 prime factors and 4 positive divisors. There are 21378280 positive integers (up to 21387979) that are relatively prime to 21387979.

Interesting facts

Basic properties

Name

Name twenty-one million three hundred eighty-seven thousand nine hundred seventy-nine

Notation

Scientific notation 2.1387979 × 10^7
Engineering notation 2.1387979 × 10^6

Prime Factorization of 21387979

Prime Factorization 3389 × 6311

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21387979
Product of the distinct prime numbers

The prime factorization of 21387979 is 3389 × 6311. Since it has a total of 2 prime factors.

Most popular turbo-numbers

3, 10, 14, 85, 870, 472, 8079, 1664, 68890, 47664, 971109, 581590, 1744415, 5708729, 59968561, 16801384, 864129414, 44665431, 3143314158, 9498898963

Basic calculations (n = 21387979)

Multiplication

n×y
n×2 42775958
n×3 64163937
n×4 85551916
n×5 106939895

Division

n÷y
n÷2 10693989.5
n÷3 7129326.3333333
n÷3 5346994.75
n÷5 4277595.8

Exponentiation

ny
n2 457445645704441
n3 9.783837863968E+21
n4 2.0925651877395E+29
n5 4.4755740291504E+36

Nth Root

y√n
2√n 4624.7139370992
3√n 277.58111526392
4√n 68.00524933488
5√n 29.243809745214

Divisors of 21387979

1, 3389, 6311, 21387979

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 -21387978
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 21387979 can be divided by 4 positive divisors. The sum of these divisors (counting 21387979) is 1, the average is 0.25.

Base conversion 21387979

Base System Value
2 Binary 1010001100101101011001011
3 Ternary 1111020121210101
4 Quaternary 1101211223023
5 Quinary 20433403404
6 Senary 2042230231
8 Octal 121455313
10 Decimal 21387979
12 Duodecimal 71b5377
16 Hexadecimal 1465acb
20 Vigesimal 6dd9ij
36 Base36 cqf2j

Cryptographic Hash Functions

md5 968711faa05752dd38c8582b068e9fe5
sha1 db8f9d7d996584bde635c5ec7f215000f8fad8f1
sha256 d1a558c801fb5349bd3b18b6cb7bacdf7717029d078ae518e838aa867b8139a9
sha512 f69c24e33490d9ebbc99cf377e205492452556802b0301867cbd836ad729e99bb521b33b1fc6c36e712bf51eafd02b55debe0db1258f4b187dd7fa3c2bc416cb
ripemd-160 b488ac85fbe3c7310b057e372c56881186c19040

21387979 as geometric shapes

Circle

Radius = n
Diameter 42775958
Circumference 134384635.40307
Area 1.4371078799617E+15

Sphere

Radius = n
Volume 4.0982444209807E+22
Surface area 5.7484315198468E+15
Circumference 134384635.40307

Square

Length = n
Perimeter 85551916
Area 457445645704441
Diagonal 30247169.973551

Cube

Length = n
Surface area 2744673874226646
Volume 9.783837863968E+21
Space diagonal 37045066.299216

Equilateral Triangle

Length = n
Perimeter 64163937
Area 1.9807977501531E+14
Altitude 18522533.149608

Triangular Pyramid

Length = n
Surface area 1.9807977501531E+14
Volume 1.1530363499402E+21
Height 10082389.991184