20821645 (number)

20821645 is an odd 8-digits composite number following 20821644 and preceding 20821646. In scientific notation, it is written as 2.0821645 × 10^7. The sum of its digits is 28. It has a total of 4 prime factors and 16 positive divisors. There are 14976000 positive integers (up to 20821645) that are relatively prime to 20821645.

Interesting facts

Basic properties

Name

Name twenty million eight hundred twenty-one thousand six hundred forty-five

Notation

Scientific notation 2.0821645 × 10^7
Engineering notation 2.0821645 × 10^6

Prime Factorization of 20821645

Prime Factorization 65 × 13 × 41 × 601

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 20821645
Product of the distinct prime numbers

The prime factorization of 20821645 is 65 × 13 × 41 × 601. Since it has a total of 4 prime factors.

Most popular turbo-numbers

3, 1, 9, 35, 702, 338, 7638, 9533, 75972, 92538, 815017, 781058, 3351702, 5661354, 14417165, 32813983, 538078620, 115281904, 475849759, 4353004500

Basic calculations (n = 20821645)

Multiplication

n×y
n×2 41643290
n×3 62464935
n×4 83286580
n×5 104108225

Division

n÷y
n÷2 10410822.5
n÷3 6940548.3333333
n÷3 5205411.25
n÷5 4164329

Exponentiation

ny
n2 433540900506025
n3 9.0270347233168E+21
n4 1.8795771241158E+29
n5 3.9135887628459E+36

Nth Root

y√n
2√n 4563.0740734728
3√n 275.10913574632
4√n 67.550529779365
5√n 29.087273033768

Divisors of 20821645

1, 13, 41, 65, 533, 601, 845, 2665, 7813, 24641, 34645, 39065, 320333, 507845, 1601665, 20821645

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -20821644
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 20821645 can be divided by 16 positive divisors. The sum of these divisors (counting 20821645) is 1, the average is 0.0625.

Base conversion 20821645

Base System Value
2 Binary 1001111011011011010001101
3 Ternary 1110011211221001
4 Quaternary 1033123122031
5 Quinary 20312243040
6 Senary 2022140301
8 Octal 117333215
10 Decimal 20821645
12 Duodecimal 6b81691
16 Hexadecimal 13db68d
20 Vigesimal 6a2e25
36 Base36 cea31

Cryptographic Hash Functions

md5 1a17f1b01e097c92a1e782bbc0436d5b
sha1 89b259d1528f4ffc98046d6939ee592967107a10
sha256 d5791aba054666757f02111bc69f16c24d70bf28a3600d2699a2366850eb7238
sha512 d9cd4b9b9843a23aac4dcf1e41f0b4e2a68aedd66899a00e93dcbab42404a2581893ddeee9e4f2a25cd15e4a00e20ac00e06f6c6aa4fa3ddef53920e15915b93
ripemd-160 b73f821fe98c43980a54f37636435528bf4fe707

20821645 as geometric shapes

Circle

Radius = n
Diameter 41643290
Circumference 130826253.93531
Area 1.3620089080604E+15

Sphere

Radius = n
Volume 3.7812354627296E+22
Surface area 5.4480356322417E+15
Circumference 130826253.93531

Square

Length = n
Perimeter 83286580
Area 433540900506025
Diagonal 29446252.749918

Cube

Length = n
Surface area 2601245403036150
Volume 9.0270347233168E+21
Space diagonal 36064147.037162

Equilateral Triangle

Length = n
Perimeter 62464935
Area 1.877287167089E+14
Altitude 18032073.518581

Triangular Pyramid

Length = n
Surface area 1.877287167089E+14
Volume 1.0638462444773E+21
Height 9815417.583306