21686821 (number)

21686821 is an odd 8-digits composite number following 21686820 and preceding 21686822. In scientific notation, it is written as 2.1686821 × 10^7. The sum of its digits is 34. It has a total of 4 prime factors and 16 positive divisors. There are 19483200 positive integers (up to 21686821) that are relatively prime to 21686821.

Interesting facts

Basic properties

Name

Name twenty-one million six hundred eighty-six thousand eight hundred twenty-one

Notation

Scientific notation 2.1686821 × 10^7
Engineering notation 2.1686821 × 10^6

Prime Factorization of 21686821

Prime Factorization 13 × 83 × 199 × 101

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 21686821
Product of the distinct prime numbers

The prime factorization of 21686821 is 13 × 83 × 199 × 101. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 9, 43, 68, 936, 314, 238, 1661, 63016, 78680, 720165, 670265, 7419025, 3719753, 58213001, 48254306, 488311481, 212906103, 3640936917, 9899746181

Basic calculations (n = 21686821)

Multiplication

n×y
n×2 43373642
n×3 65060463
n×4 86747284
n×5 108434105

Division

n÷y
n÷2 10843410.5
n÷3 7228940.3333333
n÷3 5421705.25
n÷5 4337364.2

Exponentiation

ny
n2 470318205086041
n3 1.0199706726742E+22
n4 2.2119921403536E+29
n5 4.7971077601254E+36

Nth Root

y√n
2√n 4656.911100719
3√n 278.86796765743
4√n 68.241564319108
5√n 29.325078204754

Divisors of 21686821

1, 13, 83, 101, 199, 1079, 1313, 2587, 8383, 16517, 20099, 108979, 214721, 261287, 1668217, 21686821

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 -21686820
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 21686821 can be divided by 16 positive divisors. The sum of these divisors (counting 21686821) is 1, the average is 0.0625.

Base conversion 21686821

Base System Value
2 Binary 1010010101110101000100101
3 Ternary 1111210210201121
4 Quaternary 1102232220211
5 Quinary 21022434241
6 Senary 2052453541
8 Octal 122565045
10 Decimal 21686821
12 Duodecimal 731a2b1
16 Hexadecimal 14aea25
20 Vigesimal 6fah11
36 Base36 cwtnp

Cryptographic Hash Functions

md5 c14d0e9b5ce4a61b3e94a3e38f74275e
sha1 3a6acbc6230138af77c0e505cd6cabbe29918454
sha256 e24ab7d4a5d10e892c7377f1a498ee0ba34c8fb09a7d82590a8ec827f60f4f99
sha512 23c2e782c826dd61578e80b1fe5198810fa4655d6df21f6d8400e88edf592aec376b99c0d5af058e038b8f31ea605791da10dae5a3807f0d3a0fbea4fd79eaf4
ripemd-160 63d693533c2d095868d1ec4f580e9e13fa5d4d6e

21686821 as geometric shapes

Circle

Radius = n
Diameter 43373642
Circumference 136262315.06663
Area 1.4775482179478E+15

Sphere

Radius = n
Volume 4.2724431628672E+22
Surface area 5.9101928717914E+15
Circumference 136262315.06663

Square

Length = n
Perimeter 86747284
Area 470318205086041
Diagonal 30669796.382958

Cube

Length = n
Surface area 2821909230516246
Volume 1.0199706726742E+22
Space diagonal 37562675.826652

Equilateral Triangle

Length = n
Perimeter 65060463
Area 2.0365375673341E+14
Altitude 18781337.913326

Triangular Pyramid

Length = n
Surface area 2.0365375673341E+14
Volume 1.2020469654322E+21
Height 10223265.460986