21861978 (number)

21861978 is an even 8-digits composite number following 21861977 and preceding 21861979. In scientific notation, it is written as 2.1861978 × 10^7. The sum of its digits is 42. It has a total of 4 prime factors and 16 positive divisors. There are 7163696 positive integers (up to 21861978) that are relatively prime to 21861978.

Interesting facts

Basic properties

Name

Name twenty-one million eight hundred sixty-one thousand nine hundred seventy-eight

Notation

Scientific notation 2.1861978 × 10^7
Engineering notation 2.1861978 × 10^6

Prime Factorization of 21861978

Prime Factorization 2 × 59 × 3 × 61757

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21861978
Product of the distinct prime numbers

The prime factorization of 21861978 is 2 × 59 × 3 × 61757. Since it has a total of 4 prime factors.

Most popular turbo-numbers

2, 5, 6, 24, 977, 538, 3054, 7067, 20282, 54222, 870753, 126805, 5501556, 4276275, 68422149, 83704424, 438389984, 754171188, 410860182, 8994212394

Basic calculations (n = 21861978)

Multiplication

n×y
n×2 43723956
n×3 65585934
n×4 87447912
n×5 109309890

Division

n÷y
n÷2 10930989
n÷3 7287326
n÷3 5465494.5
n÷5 4372395.6

Exponentiation

ny
n2 477946082072484
n3 1.0448846731455E+22
n4 2.2843245736844E+29
n5 4.9939853574747E+36

Nth Root

y√n
2√n 4675.679415871
3√n 279.61672900984
4√n 68.378939856297
5√n 29.372295622304

Divisors of 21861978

1, 2, 3, 6, 59, 118, 177, 354, 61757, 123514, 185271, 370542, 3643663, 7287326, 10930989, 21861978

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21861977
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21861978 can be divided by 16 positive divisors. The sum of these divisors (counting 21861978) is 1, the average is 0.0625.

Base conversion 21861978

Base System Value
2 Binary 1010011011001011001011010
3 Ternary 1112010200222220
4 Quaternary 1103121121122
5 Quinary 21044040403
6 Senary 2100324510
8 Octal 123313132
10 Decimal 21861978
12 Duodecimal 73a3736
16 Hexadecimal 14d965a
20 Vigesimal 6gceii
36 Base36 d0kt6

Cryptographic Hash Functions

md5 3a5975b2311c3846bf94a6a65c98893c
sha1 9cb0d84cbbb9cb9d9b4c255d33da63c258d12f47
sha256 54fe453dd4e67f8919c4238d2da122f9936d1a28e08fb4b17aaa51e04b21025e
sha512 280be97dc901a9deaebdf801a67cdbab785c37f16b0203b734738119f72b0580ec0ac79ea12fd0ba754d9194035fac08baad7c37760986ece432f498ee7c4d67
ripemd-160 1db6f0df09a5a56f0b529faf55af845484527d51

21861978 as geometric shapes

Circle

Radius = n
Diameter 43723956
Circumference 137362858.95548
Area 1.5015119002509E+15

Sphere

Radius = n
Volume 4.3768026840032E+22
Surface area 6.0060476010038E+15
Circumference 137362858.95548

Square

Length = n
Perimeter 87447912
Area 477946082072484
Diagonal 30917505.787902

Cube

Length = n
Surface area 2867676492434904
Volume 1.0448846731455E+22
Space diagonal 37866056.649953

Equilateral Triangle

Length = n
Perimeter 65585934
Area 2.0695672435701E+14
Altitude 18933028.324977

Triangular Pyramid

Length = n
Surface area 2.0695672435701E+14
Volume 1.2314083965651E+21
Height 10305835.262634