19905 (number)

19905 is an odd 5-digits composite number following 19904 and preceding 19906. In scientific notation, it is written as 1.9905 × 10^4. The sum of its digits is 24. It has a total of 3 prime factors and 8 positive divisors. There are 10608 positive integers (up to 19905) that are relatively prime to 19905.

Interesting facts

Basic properties

Name

Name nineteen thousand nine hundred five

Notation

Scientific notation 1.9905 × 10^4
Engineering notation 1.9905 × 10^3

Prime Factorization of 19905

Prime Factorization 3 × 5 × 1327

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 19905
Product of the distinct prime numbers

The prime factorization of 19905 is 3 × 5 × 1327. Since it has a total of 3 prime factors.

Most popular turbo-numbers

4, 10, 73, 4, 455, 830, 9838, 68, 75691, 84621, 40732, 938533, 1751269, 9960159, 16342008, 76921664, 629178155, 429928704, 8723111880, 1243447154

Basic calculations (n = 19905)

Multiplication

n×y
n×2 39810
n×3 59715
n×4 79620
n×5 99525

Division

n÷y
n÷2 9952.5
n÷3 6635
n÷3 4976.25
n÷5 3981

Exponentiation

ny
n2 396209025
n3 7886540642625
n4 156981591491450625
n5 3.1247185786373E+21

Nth Root

y√n
2√n 141.08508071373
3√n 27.101129657934
4√n 11.877924091091
5√n 7.2408981102902

Divisors of 19905

1, 3, 5, 15, 1327, 3981, 6635, 19905

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -19904
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 19905 can be divided by 8 positive divisors. The sum of these divisors (counting 19905) is 1, the average is 0.125.

Base conversion 19905

Base System Value
2 Binary 100110111000001
3 Ternary 1000022020
4 Quaternary 10313001
5 Quinary 1114110
6 Senary 232053
8 Octal 46701
10 Decimal 19905
12 Duodecimal b629
16 Hexadecimal 4dc1
20 Vigesimal 29f5
36 Base36 fcx

Cryptographic Hash Functions

md5 686dfb661910361a49dd13a49674b668
sha1 e03d802d8548c15176fc3ec331645926b37e91aa
sha256 d42ffee040c5462ac18ba25d8a784410f1bd9e3d81a813950dbe087277330c3e
sha512 eb3280fa5db5b71f2d73f1327f40d965a048c1d718299b7d7aa381672cfa9bb261bbe10ebe67dc7d1924d60ecd6efbdff3977f616ff1e37f30b6bbf5bd3ed78d
ripemd-160 5ed09ab6644462d33c9d16564c32df5e06589ab0

19905 as geometric shapes

Circle

Radius = n
Diameter 39810
Circumference 125066.80353941
Area 1244727362.226

Sphere

Radius = n
Volume 33035064193477
Surface area 4978909448.9039
Circumference 125066.80353941

Square

Length = n
Perimeter 79620
Area 396209025
Diagonal 28149.920959036

Cube

Length = n
Surface area 2377254150
Volume 7886540642625
Space diagonal 34476.471324659

Equilateral Triangle

Length = n
Perimeter 59715
Area 171563540.42933
Altitude 17238.235662329

Triangular Pyramid

Length = n
Surface area 171563540.42933
Volume 929437728083.91
Height 9383.3069863455