20991687 (number)

20991687 is an odd 8-digits composite number following 20991686 and preceding 20991688. In scientific notation, it is written as 2.0991687 × 10^7. The sum of its digits is 42. It has a total of 2 prime factors and 4 positive divisors. There are 13994456 positive integers (up to 20991687) that are relatively prime to 20991687.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.0991687 × 10^7
Engineering notation 2.0991687 × 10^6

Prime Factorization of 20991687

Prime Factorization 3 × 6997229

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 20991687
Product of the distinct prime numbers

The prime factorization of 20991687 is 3 × 6997229. Since it has a total of 2 prime factors.

Most popular turbo-numbers

9, 4, 54, 61, 912, 889, 1870, 2741, 93365, 20820, 961360, 386022, 6324030, 69185, 32639692, 82824559, 14907129, 437775657, 8835703333, 5339547612

Basic calculations (n = 20991687)

Multiplication

n×y
n×2 41983374
n×3 62975061
n×4 83966748
n×5 104958435

Division

n÷y
n÷2 10495843.5
n÷3 6997229
n÷3 5247921.75
n÷5 4198337.4

Exponentiation

ny
n2 440650923105969
n3 9.2500062541016E+21
n4 1.9417323603414E+29
n5 4.0760237946058E+36

Nth Root

y√n
2√n 4581.6685825145
3√n 275.85600817198
4√n 67.688023922363
5√n 29.134627407672

Divisors of 20991687

1, 3, 6997229, 20991687

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20991686
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20991687 can be divided by 4 positive divisors. The sum of these divisors (counting 20991687) is 1, the average is 0.25.

Base conversion 20991687

Base System Value
2 Binary 1010000000100111011000111
3 Ternary 1110111111011220
4 Quaternary 1100010323013
5 Quinary 20333213222
6 Senary 2025531423
8 Octal 120047307
10 Decimal 20991687
12 Duodecimal 7043b73
16 Hexadecimal 1404ec7
20 Vigesimal 6b3j47
36 Base36 chxaf

Cryptographic Hash Functions

md5 a3e0ab1a1e6c6c8a60864a0300ecf8a3
sha1 b922d1f4ee212e2b1a2c613c1a83f2773e532d56
sha256 f132210ca2b886def50c506206b06b5bd2531a4184847db35443a36edab4169f
sha512 2c38917c4a67f79e55b5f395d76347776140e973491d2155b9f0e864e59b72b6c901b66a738ca9296696e564d6e0e82c194e3669388ce15678ed449886208352
ripemd-160 befdb2c115c8a38208cc5c64831d3abbfbee5023

20991687 as geometric shapes

Circle

Radius = n
Diameter 41983374
Circumference 131894659.33131
Area 1.3843457028273E+15

Sphere

Radius = n
Volume 3.8746335591394E+22
Surface area 5.5373828113091E+15
Circumference 131894659.33131

Square

Length = n
Perimeter 83966748
Area 440650923105969
Diagonal 29686728.452491

Cube

Length = n
Surface area 2643905538635814
Volume 9.2500062541016E+21
Space diagonal 36358668.420583

Equilateral Triangle

Length = n
Perimeter 62975061
Area 1.9080744680542E+14
Altitude 18179334.210292

Triangular Pyramid

Length = n
Surface area 1.9080744680542E+14
Volume 1.0901236913822E+21
Height 9895576.1508303