18921 (number)

18921 is an odd 5-digits composite number following 18920 and preceding 18922. In scientific notation, it is written as 1.8921 × 10^4. The sum of its digits is 21. It has a total of 4 prime factors and 16 positive divisors. There are 9984 positive integers (up to 18921) that are relatively prime to 18921.

Interesting facts

Basic properties

Name

Name eighteen thousand nine hundred twenty-one

Notation

Scientific notation 1.8921 × 10^4
Engineering notation 1.8921 × 10^3

Prime Factorization of 18921

Prime Factorization 7 × 3 × 17 × 53

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 18921
Product of the distinct prime numbers

The prime factorization of 18921 is 7 × 3 × 17 × 53. Since it has a total of 4 prime factors.

Most popular turbo-numbers

10, 10, 74, 98, 258, 689, 2154, 4095, 42419, 56783, 599079, 672183, 4475645, 1824139, 16810145, 34823772, 974739600, 794277436, 8779245197, 1220462264

Basic calculations (n = 18921)

Multiplication

n×y
n×2 37842
n×3 56763
n×4 75684
n×5 94605

Division

n÷y
n÷2 9460.5
n÷3 6307
n÷3 4730.25
n÷5 3784.2

Exponentiation

ny
n2 358004241
n3 6773798243961
n4 128167036573986081
n5 2.4250484990164E+21

Nth Root

y√n
2√n 137.55362590641
3√n 26.646982000625
4√n 11.728325792985
5√n 7.1678484944074

Divisors of 18921

1, 3, 7, 17, 21, 51, 53, 119, 159, 357, 371, 901, 1113, 2703, 6307, 18921

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 -18920
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 18921 can be divided by 16 positive divisors. The sum of these divisors (counting 18921) is 1, the average is 0.0625.

Base conversion 18921

Base System Value
2 Binary 100100111101001
3 Ternary 221221210
4 Quaternary 10213221
5 Quinary 1101141
6 Senary 223333
8 Octal 44751
10 Decimal 18921
12 Duodecimal ab49
16 Hexadecimal 49e9
20 Vigesimal 2761
36 Base36 ell

Cryptographic Hash Functions

md5 c76e0311deedd13a30ae50f3cf210245
sha1 f9378625cbbd0fb4090dc2681d45bb2707493c8c
sha256 2b63acf994ce562421adff2f57e3bb532c3e788d3a7a516aefa73c93a856a466
sha512 cd3899d58360fcc5c150fd4b2998764fa175a62eba3a71da1bd8f3624aa2af96236369e48ed380ab8c384868a930233b470d6c466a3a2f4424045912ceeaa40b
ripemd-160 d2bdcc6dc391926474b03873b13fa3fe4b9c51d1

18921 as geometric shapes

Circle

Radius = n
Diameter 37842
Circumference 118884.14919714
Area 1124703493.4796

Sphere

Radius = n
Volume 28374019733503
Surface area 4498813973.9184
Circumference 118884.14919714

Square

Length = n
Perimeter 75684
Area 358004241
Diagonal 26758.334813661

Cube

Length = n
Surface area 2148025446
Volume 6773798243961
Space diagonal 32772.133330011

Equilateral Triangle

Length = n
Perimeter 56763
Area 155020383.68428
Altitude 16386.066665005

Triangular Pyramid

Length = n
Surface area 155020383.68428
Volume 798299778782.39
Height 8919.4449378871