18981921 (number)

18981921 is an odd 8-digits composite number following 18981920 and preceding 18981922. In scientific notation, it is written as 1.8981921 × 10^7. The sum of its digits is 39. It has a total of 5 prime factors and 32 positive divisors. There are 10301760 positive integers (up to 18981921) that are relatively prime to 18981921.

Interesting facts

Basic properties

Name

Name eighteen million nine hundred eighty-one thousand nine hundred twenty-one

Notation

Scientific notation 1.8981921 × 10^7
Engineering notation 1.8981921 × 10^6

Prime Factorization of 18981921

Prime Factorization 3 × 7 × 29 × 71 × 439

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 18981921
Product of the distinct prime numbers

The prime factorization of 18981921 is 3 × 7 × 29 × 71 × 439. Since it has a total of 5 prime factors.

Most popular turbo-numbers

6, 1, 59, 68, 7, 146, 7434, 3237, 58545, 96913, 458080, 514898, 1343641, 465307, 29957016, 3625594, 86940709, 891136470, 304465349, 5643157907

Basic calculations (n = 18981921)

Multiplication

n×y
n×2 37963842
n×3 56945763
n×4 75927684
n×5 94909605

Division

n÷y
n÷2 9490960.5
n÷3 6327307
n÷3 4745480.25
n÷5 3796384.2

Exponentiation

ny
n2 360313324850241
n3 6.8394390675546E+21
n4 1.2982569206464E+29
n5 2.4643410305412E+36

Nth Root

y√n
2√n 4356.8246464599
3√n 266.75550286748
4√n 66.006247026019
5√n 28.554070819669

Divisors of 18981921

1, 3, 7, 21, 29, 71, 87, 203, 213, 439, 497, 609, 1317, 1491, 2059, 3073, 6177, 9219, 12731, 14413, 31169, 38193, 43239, 89117, 93507, 218183, 267351, 654549, 903901, 2711703, 6327307, 18981921

32 divisors

τ Total Divisors 32
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -18981920
Sum of the proper positive divisors of n
A Arithmetic Mean 0.03125
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 32
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 18981921 can be divided by 32 positive divisors. The sum of these divisors (counting 18981921) is 1, the average is 0.03125.

Base conversion 18981921

Base System Value
2 Binary 1001000011010010000100001
3 Ternary 1022201101022010
4 Quaternary 1020122100201
5 Quinary 14324410141
6 Senary 1514503133
8 Octal 110322041
10 Decimal 18981921
12 Duodecimal 6434aa9
16 Hexadecimal 121a421
20 Vigesimal 5iceg1
36 Base36 baujl

Cryptographic Hash Functions

md5 bfa11aa5921e262872001a7c4b751920
sha1 afee7e306b5a1682bf1b749b72d7aa3a98322032
sha256 341b63ce993856dfb351ebab48473ee37d051d6ec8dafa77cf842719c0d21e72
sha512 ae1302713a9f8b88b700d8866b7e1422ca63014aaa9d8fdda994cc82adc4203fb0205fbd8717dc8b3596a71c5607d8ae9d9145dd5e5c5fb522d1b68b71cfae4d
ripemd-160 4b2cb4f6656d9fa8ae56c9ca5944a74bf6e8c2f0

18981921 as geometric shapes

Circle

Radius = n
Diameter 37963842
Circumference 119266927.12924
Area 1.13195769434E+15

Sphere

Radius = n
Volume 2.8648975372406E+22
Surface area 4.5278307773601E+15
Circumference 119266927.12924

Square

Length = n
Perimeter 75927684
Area 360313324850241
Diagonal 26844490.118095

Cube

Length = n
Surface area 2161879949101446
Volume 6.8394390675546E+21
Space diagonal 32877651.597259

Equilateral Triangle

Length = n
Perimeter 56945763
Area 1.5602024632117E+14
Altitude 16438825.798629

Triangular Pyramid

Length = n
Surface area 1.5602024632117E+14
Volume 8.0603562403001E+20
Height 8948163.3726982