20421905 (number)

20421905 is an odd 8-digits composite number following 20421904 and preceding 20421906. In scientific notation, it is written as 2.0421905 × 10^7. The sum of its digits is 23. It has a total of 4 prime factors and 16 positive divisors. There are 13898112 positive integers (up to 20421905) that are relatively prime to 20421905.

Interesting facts

Basic properties

Name

Name twenty million four hundred twenty-one thousand nine hundred five

Notation

Scientific notation 2.0421905 × 10^7
Engineering notation 2.0421905 × 10^6

Prime Factorization of 20421905

Prime Factorization 7 × 5 × 137 × 4259

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 20421905
Product of the distinct prime numbers

The prime factorization of 20421905 is 7 × 5 × 137 × 4259. Since it has a total of 4 prime factors.

Most popular turbo-numbers

4, 1, 35, 65, 41, 68, 2093, 6983, 61359, 98149, 870676, 31156, 1746982, 5815586, 78977476, 68716983, 524340237, 771851288, 5956381878, 5543871973

Basic calculations (n = 20421905)

Multiplication

n×y
n×2 40843810
n×3 61265715
n×4 81687620
n×5 102109525

Division

n÷y
n÷2 10210952.5
n÷3 6807301.6666667
n÷3 5105476.25
n÷5 4084381

Exponentiation

ny
n2 417054203829025
n3 8.517041330447E+21
n4 1.7393420893146E+29
n5 3.5520678910485E+36

Nth Root

y√n
2√n 4519.0601899067
3√n 273.33720580805
4√n 67.223955476502
5√n 28.974720167243

Divisors of 20421905

1, 5, 7, 35, 137, 685, 959, 4259, 4795, 21295, 29813, 149065, 583483, 2917415, 4084381, 20421905

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 -20421904
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 20421905 can be divided by 16 positive divisors. The sum of these divisors (counting 20421905) is 1, the average is 0.0625.

Base conversion 20421905

Base System Value
2 Binary 1001101111001110100010001
3 Ternary 1102102112120212
4 Quaternary 1031321310101
5 Quinary 20212000110
6 Senary 2005413505
8 Octal 115716421
10 Decimal 20421905
12 Duodecimal 6a0a295
16 Hexadecimal 1379d11
20 Vigesimal 67cef5
36 Base36 c5pn5

Cryptographic Hash Functions

md5 19bb586147ec37c9e6fae659eb5ad6ec
sha1 2010bc824b7de54a692129cb9eef55bf2da52782
sha256 b4618bd62d45b640fc307af942df3d0434fa54fd54ff8b29ca181e6f39a2da07
sha512 4cf497287433bdb005ddfacdffdb67975bdaf4ef78e447ad38e19fd9847fd3d4a180a24a30567c3d4a49f91edac2628692d6e2f64082903c41431d167e384b9b
ripemd-160 f47b7e46d85b51d73fcafe9d9c3da482f01c2906

20421905 as geometric shapes

Circle

Radius = n
Diameter 40843810
Circumference 128314613.44062
Area 1.310214422898E+15

Sphere

Radius = n
Volume 3.5676099298737E+22
Surface area 5.240857691592E+15
Circumference 128314613.44062

Square

Length = n
Perimeter 81687620
Area 417054203829025
Diagonal 28880935.020495

Cube

Length = n
Surface area 2502325222974150
Volume 8.517041330447E+21
Space diagonal 35371777.047345

Equilateral Triangle

Length = n
Perimeter 61265715
Area 1.8058976763551E+14
Altitude 17685888.523672

Triangular Pyramid

Length = n
Surface area 1.8058976763551E+14
Volume 1.0037429467342E+21
Height 9626978.340165