21921978 (number)

21921978 is an even 8-digits composite number following 21921977 and preceding 21921979. In scientific notation, it is written as 2.1921978 × 10^7. The sum of its digits is 39. It has a total of 4 prime factors and 16 positive divisors. There are 6689088 positive integers (up to 21921978) that are relatively prime to 21921978.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1921978 × 10^7
Engineering notation 2.1921978 × 10^6

Prime Factorization of 21921978

Prime Factorization 2 × 39 × 127 × 2213

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21921978
Product of the distinct prime numbers

The prime factorization of 21921978 is 2 × 39 × 127 × 2213. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 3, 9, 28, 465, 494, 3073, 1537, 67984, 75553, 748094, 965967, 1931594, 2684752, 47436157, 56359385, 241035733, 804382816, 4728050872, 4762217132

Basic calculations (n = 21921978)

Multiplication

n×y
n×2 43843956
n×3 65765934
n×4 87687912
n×5 109609890

Division

n÷y
n÷2 10960989
n÷3 7307326
n÷3 5480494.5
n÷5 4384395.6

Exponentiation

ny
n2 480573119432484
n3 1.053511335159E+22
n4 2.3095052312107E+29
n5 5.0628922869486E+36

Nth Root

y√n
2√n 4682.0911994535
3√n 279.87229720816
4√n 68.425807992698
5√n 29.388400351978

Divisors of 21921978

1, 2, 39, 78, 127, 254, 2213, 4426, 4953, 9906, 86307, 172614, 281051, 562102, 10960989, 21921978

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 -21921977
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 21921978 can be divided by 16 positive divisors. The sum of these divisors (counting 21921978) is 1, the average is 0.0625.

Base conversion 21921978

Base System Value
2 Binary 1010011101000000010111010
3 Ternary 1112020202022010
4 Quaternary 1103220002322
5 Quinary 21103000403
6 Senary 2101510350
8 Octal 123500272
10 Decimal 21921978
12 Duodecimal 74123b6
16 Hexadecimal 14e80ba
20 Vigesimal 6h04ii
36 Base36 d1v3u

Cryptographic Hash Functions

md5 08de7b7f03001cec1f521a2b1e94fa3a
sha1 08b6eb8a4917b5f2c0eb8babc4dbcea04e1c7793
sha256 75b5080d845fe11c6b790883f276c40304e73511aa23ef4a1935d7264e750a50
sha512 37640500ec365b3af9c2c5c6d6eb04549785227bcfee21609811a14ddc7f388583aa1f7452d570fa16e8eeef75e27cbca1909153d87e42136680da756cf9ee87
ripemd-160 565a4b09283ac6ebc0a8754b9d768d838ca3324c

21921978 as geometric shapes

Circle

Radius = n
Diameter 43843956
Circumference 137739850.07391
Area 1.5097649815218E+15

Sphere

Radius = n
Volume 4.4129379613456E+22
Surface area 6.0390599260873E+15
Circumference 137739850.07391

Square

Length = n
Perimeter 87687912
Area 480573119432484
Diagonal 31002358.601645

Cube

Length = n
Surface area 2883438716594904
Volume 1.053511335159E+22
Space diagonal 37969979.698407

Equilateral Triangle

Length = n
Perimeter 65765934
Area 2.0809426490223E+14
Altitude 18984989.849204

Triangular Pyramid

Length = n
Surface area 2.0809426490223E+14
Volume 1.2415750152464E+21
Height 10334119.533882