20807821 (number)

20807821 is an odd 8-digits composite number following 20807820 and preceding 20807822. In scientific notation, it is written as 2.0807821 × 10^7. The sum of its digits is 28. It has a total of 2 prime factors and 4 positive divisors. There are 20792700 positive integers (up to 20807821) that are relatively prime to 20807821.

Interesting facts

Basic properties

Name

Name twenty million eight hundred seven thousand eight hundred twenty-one

Notation

Scientific notation 2.0807821 × 10^7
Engineering notation 2.0807821 × 10^6

Prime Factorization of 20807821

Prime Factorization 1531 × 13591

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 20807821
Product of the distinct prime numbers

The prime factorization of 20807821 is 1531 × 13591. Since it has a total of 2 prime factors.

Most popular turbo-numbers

7, 3, 19, 30, 592, 122, 923, 4347, 37955, 84391, 810218, 369899, 4792389, 1347681, 55655036, 48873667, 145286379, 717102941, 3432818495, 5123086651

Basic calculations (n = 20807821)

Multiplication

n×y
n×2 41615642
n×3 62423463
n×4 83231284
n×5 104039105

Division

n÷y
n÷2 10403910.5
n÷3 6935940.3333333
n÷3 5201955.25
n÷5 4161564.2

Exponentiation

ny
n2 432965414768041
n3 9.0090668496842E+21
n4 1.8745905038526E+29
n5 3.9006143652465E+36

Nth Root

y√n
2√n 4561.559053657
3√n 275.04823836986
4√n 67.539314874057
5√n 29.083409657063

Divisors of 20807821

1, 1531, 13591, 20807821

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 -20807820
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 20807821 can be divided by 4 positive divisors. The sum of these divisors (counting 20807821) is 1, the average is 0.25.

Base conversion 20807821

Base System Value
2 Binary 1001111011000000010001101
3 Ternary 1110011010222001
4 Quaternary 1033120002031
5 Quinary 20311322241
6 Senary 2021552301
8 Octal 117300215
10 Decimal 20807821
12 Duodecimal 6b75691
16 Hexadecimal 13d808d
20 Vigesimal 6a0jb1
36 Base36 cdzf1

Cryptographic Hash Functions

md5 82512d61b9e6ca0d62605bb743460275
sha1 a11009618929cd4bd1e0e8ff9ea2c69303f4af4c
sha256 254eb8e0f4325bfd9d11737c8ed62ab262316185c3bb5697324bbc575b8c8318
sha512 b3101d3fdf13cddeddd2926e2bcd9b8bdbf6f5f8240b87eeebdf65ec368b6b5db9073779a2e9f148baecf68fb91177bdc2a844827254e1fabced98a38a3d1cfe
ripemd-160 05b787a649e110592f8be31923a4c039dee8fec9

20807821 as geometric shapes

Circle

Radius = n
Diameter 41615642
Circumference 130739395.18162
Area 1.3602009662937E+15

Sphere

Radius = n
Volume 3.7737090974223E+22
Surface area 5.4408038651749E+15
Circumference 130739395.18162

Square

Length = n
Perimeter 83231284
Area 432965414768041
Diagonal 29426702.661632

Cube

Length = n
Surface area 2597792488608246
Volume 9.0090668496842E+21
Space diagonal 36040203.166799

Equilateral Triangle

Length = n
Perimeter 62423463
Area 1.8747952407459E+14
Altitude 18020101.583399

Triangular Pyramid

Length = n
Surface area 1.8747952407459E+14
Volume 1.0617287102624E+21
Height 9808900.8872106