21389905 (number)

21389905 is an odd 8-digits composite number following 21389904 and preceding 21389906. In scientific notation, it is written as 2.1389905 × 10^7. The sum of its digits is 37. It has a total of 4 prime factors and 16 positive divisors. There are 16560000 positive integers (up to 21389905) that are relatively prime to 21389905.

Interesting facts

Basic properties

Name

Name twenty-one million three hundred eighty-nine thousand nine hundred five

Notation

Scientific notation 2.1389905 × 10^7
Engineering notation 2.1389905 × 10^6

Prime Factorization of 21389905

Prime Factorization 5 × 41 × 151 × 691

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21389905
Product of the distinct prime numbers

The prime factorization of 21389905 is 5 × 41 × 151 × 691. Since it has a total of 4 prime factors.

Most popular turbo-numbers

3, 4, 15, 61, 694, 548, 5921, 5360, 51736, 17051, 951446, 17410, 5926399, 5341805, 62097620, 7936165, 297931099, 519527586, 1901310528, 9046520799

Basic calculations (n = 21389905)

Multiplication

n×y
n×2 42779810
n×3 64169715
n×4 85559620
n×5 106949525

Division

n÷y
n÷2 10694952.5
n÷3 7129968.3333333
n÷3 5347476.25
n÷5 4277981

Exponentiation

ny
n2 457528035909025
n3 9.7864812229306E+21
n4 2.0933190364277E+29
n5 4.477589532388E+36

Nth Root

y√n
2√n 4624.9221615072
3√n 277.58944712768
4√n 68.006780261288
5√n 29.244336410673

Divisors of 21389905

1, 5, 41, 151, 205, 691, 755, 3455, 6191, 28331, 30955, 104341, 141655, 521705, 4277981, 21389905

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 -21389904
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 21389905 can be divided by 16 positive divisors. The sum of these divisors (counting 21389905) is 1, the average is 0.0625.

Base conversion 21389905

Base System Value
2 Binary 1010001100110001001010001
3 Ternary 1111020201102201
4 Quaternary 1101212021101
5 Quinary 20433434110
6 Senary 2042243201
8 Octal 121461121
10 Decimal 21389905
12 Duodecimal 71b6501
16 Hexadecimal 1466251
20 Vigesimal 6ddef5
36 Base36 cqgk1

Cryptographic Hash Functions

md5 e0a14193fcbe2bfd0dcab51f93a6932f
sha1 6281a73aef0fe359f7a5103e8fc90dc31c2b32b4
sha256 cf33aa947a87184baeb8c587896b7c8ef4e52424606ac3255037bcad6db45af7
sha512 c899fac008604228c867968e2c782dbe04c853e5f3fc26007951b87c63b423080e316a38845643acc07b3e239796dd60953f78cbfd0785ce9dd05bd79b9597ee
ripemd-160 f4ce9fc28064d42bfc7ee1dbb11688fd2120e370

21389905 as geometric shapes

Circle

Radius = n
Diameter 42779810
Circumference 134396736.81797
Area 1.4373667164232E+15

Sphere

Radius = n
Volume 4.0993516685938E+22
Surface area 5.7494668656926E+15
Circumference 134396736.81797

Square

Length = n
Perimeter 85559620
Area 457528035909025
Diagonal 30249893.748872

Cube

Length = n
Surface area 2745168215454150
Volume 9.7864812229306E+21
Space diagonal 37048402.229072

Equilateral Triangle

Length = n
Perimeter 64169715
Area 1.9811545102041E+14
Altitude 18524201.114536

Triangular Pyramid

Length = n
Surface area 1.9811545102041E+14
Volume 1.1533478727815E+21
Height 10083297.916291