18181 (number)

18181 is an odd 5-digits prime number following 18180 and preceding 18182. In scientific notation, it is written as 1.8181 × 10^4. The sum of its digits is 19. It has a total of 1 prime factors and 2 positive divisors. There are 18180 positive integers (up to 18181) that are relatively prime to 18181.

Interesting facts

Basic properties

Name

Name eighteen thousand one hundred eighty-one

Notation

Scientific notation 1.8181 × 10^4
Engineering notation 1.8181 × 10^3

Prime Factorization of 18181

Prime Factorization 18181

Composite number
ω Distinct Factors 1
Total number of distinct prime factors
Ω Total Factors 1
Total number of prime factors
rad Radical 18181
Product of the distinct prime numbers

The prime factorization of 18181 is 18181. Since it has a total of 1 prime factors.

Most popular turbo-numbers

2, 1, 5, 99, 820, 587, 1221, 1141, 61645, 21850, 876030, 590506, 7799279, 9758359, 38381105, 30671112, 383759983, 742208283, 4542278018, 6214982998

Basic calculations (n = 18181)

Multiplication

n×y
n×2 36362
n×3 54543
n×4 72724
n×5 90905

Division

n÷y
n÷2 9090.5
n÷3 6060.3333333333
n÷3 4545.25
n÷5 3636.2

Exponentiation

ny
n2 330548761
n3 6009707023741
n4 109262483398635121
n5 1.9865012106706E+21

Nth Root

y√n
2√n 134.83693855914
3√n 26.294964506992
4√n 11.611930871269
5√n 7.1108833339265

Divisors of 18181

1, 18181

2 divisors

τ Total Divisors 2
Total number of the positive divisors of n
σ Sum of Divisors 18182
Sum of all the positive divisors of n
s Aliquot Sum 1
Sum of the proper positive divisors of n
A Arithmetic Mean 9091
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 134.84064669083
Returns the nth root of the product of n divisors
H Harmonic Mean 1.9998900011
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 18181 can be divided by 2 positive divisors. The sum of these divisors (counting 18181) is 18182, the average is 9091.

Base conversion 18181

Base System Value
2 Binary 100011100000101
3 Ternary 220221101
4 Quaternary 10130011
5 Quinary 1040211
6 Senary 220101
8 Octal 43405
10 Decimal 18181
12 Duodecimal a631
16 Hexadecimal 4705
20 Vigesimal 2591
36 Base36 e11

Cryptographic Hash Functions

md5 2ccec25c9dd14baf6eefcf64304fa638
sha1 431cc3dc8225d4e8bc73990309f049d3518173c6
sha256 9316bd56924103412e5555979e7a8718dfe9770137fde0645ef8a92e51be3a42
sha512 df1087fa2cee0c4d51b1fd7971c5077a32de63b5b989b6d011c7680c88fc6897b6b01d987c4f0fb7546dd12ff28efbd604550dc9a56088389b9458856052d6b1
ripemd-160 1eb1d5eb2b089ec2390363a58c59fc912ce436d1

18181 as geometric shapes

Circle

Radius = n
Diameter 36362
Circumference 114234.59206983
Area 1038449559.2108

Sphere

Radius = n
Volume 25173401914682
Surface area 4153798236.8432
Circumference 114234.59206983

Square

Length = n
Perimeter 72724
Area 330548761
Diagonal 25711.816777505

Cube

Length = n
Surface area 1983292566
Volume 6009707023741
Space diagonal 31490.41573241

Equilateral Triangle

Length = n
Perimeter 54543
Area 143131812.10774
Altitude 15745.207866205

Triangular Pyramid

Length = n
Surface area 143131812.10774
Volume 708250764905.28
Height 8570.6055925017