20187981 (number)

20187981 is an odd 8-digits composite number following 20187980 and preceding 20187982. In scientific notation, it is written as 2.0187981 × 10^7. The sum of its digits is 36. It has a total of 5 prime factors and 32 positive divisors. There are 12096000 positive integers (up to 20187981) that are relatively prime to 20187981.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.0187981 × 10^7
Engineering notation 2.0187981 × 10^6

Prime Factorization of 20187981

Prime Factorization 3 × 9 × 101 × 11 × 673

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 20187981
Product of the distinct prime numbers

The prime factorization of 20187981 is 3 × 9 × 101 × 11 × 673. Since it has a total of 5 prime factors.

Most popular turbo-numbers

2, 3, 87, 81, 120, 782, 6587, 715, 68671, 1645, 415984, 154733, 4161574, 1665857, 60882147, 39425326, 433692964, 418915253, 2057129466, 8722612243

Basic calculations (n = 20187981)

Multiplication

n×y
n×2 40375962
n×3 60563943
n×4 80751924
n×5 100939905

Division

n÷y
n÷2 10093990.5
n÷3 6729327
n÷3 5046995.25
n÷5 4037596.2

Exponentiation

ny
n2 407554576856361
n3 8.2277040540393E+21
n4 1.6610073311657E+29
n5 3.3532384442433E+36

Nth Root

y√n
2√n 4493.1037156959
3√n 272.28954263272
4√n 67.03061774813
5√n 28.90803537292

Divisors of 20187981

1, 3, 9, 11, 27, 33, 99, 101, 297, 303, 673, 909, 1111, 2019, 2727, 3333, 6057, 7403, 9999, 18171, 22209, 29997, 66627, 67973, 199881, 203919, 611757, 747703, 1835271, 2243109, 6729327, 20187981

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 -20187980
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 20187981 can be divided by 32 positive divisors. The sum of these divisors (counting 20187981) is 1, the average is 0.03125.

Base conversion 20187981

Base System Value
2 Binary 1001101000000101101001101
3 Ternary 1101222122201000
4 Quaternary 1031000231031
5 Quinary 20132003411
6 Senary 2000410513
8 Octal 115005515
10 Decimal 20187981
12 Duodecimal 6916a39
16 Hexadecimal 1340b4d
20 Vigesimal 6639j1
36 Base36 c0p59

Cryptographic Hash Functions

md5 529809d49e3111fdec9e535e6e70b3ac
sha1 b0e863e737ea7ec6cbc3e057b7a40da6a93e6cf5
sha256 8d9e9a4050d56c9c6b686b831b35b67d12212095d6cac4234f8d03f0229f66b6
sha512 5f5b1bd970413d43eadadc36f377249f942d57bb4ce136ce14e518db1aa5e00607be57d310259d3247b5d3821ec5ed8733d08f98ce23637f4104d6107d4338a4
ripemd-160 176904c15bd376b805b30532778b3a4fc1ed767d

20187981 as geometric shapes

Circle

Radius = n
Diameter 40375962
Circumference 126844825.60082
Area 1.2803704645888E+15

Sphere

Radius = n
Volume 3.4464126149441E+22
Surface area 5.1214818583554E+15
Circumference 126844825.60082

Square

Length = n
Perimeter 80751924
Area 407554576856361
Diagonal 28550116.52713

Cube

Length = n
Surface area 2445327461138166
Volume 8.2277040540393E+21
Space diagonal 34966608.794235

Equilateral Triangle

Length = n
Perimeter 60563943
Area 1.7647630849311E+14
Altitude 17483304.397118

Triangular Pyramid

Length = n
Surface area 1.7647630849311E+14
Volume 9.696442217012E+20
Height 9516705.5090435