21508905 (number)

21508905 is an odd 8-digits composite number following 21508904 and preceding 21508906. In scientific notation, it is written as 2.1508905 × 10^7. The sum of its digits is 30. It has a total of 5 prime factors and 32 positive divisors. There are 10252800 positive integers (up to 21508905) that are relatively prime to 21508905.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 2.1508905 × 10^7
Engineering notation 2.1508905 × 10^6

Prime Factorization of 21508905

Prime Factorization 3 × 5 × 11 × 61 × 2137

Composite number
ω Distinct Factors 5
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 21508905
Product of the distinct prime numbers

The prime factorization of 21508905 is 3 × 5 × 11 × 61 × 2137. Since it has a total of 5 prime factors.

Most popular turbo-numbers

1, 3, 49, 92, 224, 389, 9026, 2586, 4284, 93736, 84744, 286474, 2755091, 6178249, 63609570, 64751992, 520780214, 638455334, 8999838772, 976741947

Basic calculations (n = 21508905)

Multiplication

n×y
n×2 43017810
n×3 64526715
n×4 86035620
n×5 107544525

Division

n÷y
n÷2 10754452.5
n÷3 7169635
n÷3 5377226.25
n÷5 4301781

Exponentiation

ny
n2 462632994299025
n3 9.9507291242433E+21
n4 2.1402928741408E+29
n5 4.6035356102072E+36

Nth Root

y√n
2√n 4637.7693991832
3√n 278.10327322598
4√n 68.101170321685
5√n 29.276803664739

Divisors of 21508905

1, 3, 5, 11, 15, 33, 55, 61, 165, 183, 305, 671, 915, 2013, 2137, 3355, 6411, 10065, 10685, 23507, 32055, 70521, 117535, 130357, 352605, 391071, 651785, 1433927, 1955355, 4301781, 7169635, 21508905

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 -21508904
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 21508905 can be divided by 32 positive divisors. The sum of these divisors (counting 21508905) is 1, the average is 0.03125.

Base conversion 21508905

Base System Value
2 Binary 1010010000011001100101001
3 Ternary 1111110202200010
4 Quaternary 1102003030221
5 Quinary 21001241110
6 Senary 2045002133
8 Octal 122031451
10 Decimal 21508905
12 Duodecimal 7253349
16 Hexadecimal 1483329
20 Vigesimal 6e8c55
36 Base36 ct0dl

Cryptographic Hash Functions

md5 2106d050d11c2f96c8060edff845fa8c
sha1 39a4d1dc367d76949ac315d4ab2b19f3be1a2a69
sha256 a7d7d090461ec06823cc12036685596cd8923b226b81c1272f1e02bd660892c8
sha512 4be4081b3edf2d3c4bc7605ba6c96f4cf3df21d4b8d45010fd4bb8a714dad1bf6906aec0bdb6356ef39cfdc384a279e4790a1ae14342f8f389d68cab386feba5
ripemd-160 1f2d9fc9928691b6362d87152db0f745e29ce6a9

21508905 as geometric shapes

Circle

Radius = n
Diameter 43017810
Circumference 135144435.86952
Area 1.4534044161981E+15

Sphere

Radius = n
Volume 4.1681516686113E+22
Surface area 5.8136176647923E+15
Circumference 135144435.86952

Square

Length = n
Perimeter 86035620
Area 462632994299025
Diagonal 30418185.162794

Cube

Length = n
Surface area 2775797965794150
Volume 9.9507291242433E+21
Space diagonal 37254516.275172

Equilateral Triangle

Length = n
Perimeter 64526715
Area 2.0032596284591E+14
Altitude 18627258.137586

Triangular Pyramid

Length = n
Surface area 2.0032596284591E+14
Volume 1.1727046735838E+21
Height 10139395.054265