21000 (number)

21000 is an even 5-digits composite number following 20999 and preceding 21001. In scientific notation, it is written as 2.1000 × 10^4. The sum of its digits is 3. It has a total of 7 prime factors and 32 positive divisors. There are 4800 positive integers (up to 21000) that are relatively prime to 21000.

Interesting facts

Basic properties

Name

Name twenty-one thousand

Notation

Scientific notation 2.1000 × 10^4
Engineering notation 2.1000 × 10^3

Prime Factorization of 21000

Prime Factorization 2 × 2 × 2 × 21 × 5 × 5 × 5

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 210
Product of the distinct prime numbers

The prime factorization of 21000 is 2 × 2 × 2 × 21 × 5 × 5 × 5. Since it has a total of 7 prime factors.

Most popular turbo-numbers

1, 4, 18, 88, 698, 544, 6101, 5434, 5127, 73870, 402955, 728410, 8195715, 5783713, 37697118, 28296232, 344060466, 439548493, 2290991291, 6724989690

Basic calculations (n = 21000)

Multiplication

n×y
n×2 42000
n×3 63000
n×4 84000
n×5 105000

Division

n÷y
n÷2 10500
n÷3 7000
n÷3 5250
n÷5 4200

Exponentiation

ny
n2 441000000
n3 9261000000000
n4 194481000000000000
n5 4.084101E+21

Nth Root

y√n
2√n 144.91376746189
3√n 27.589241763811
4√n 12.038013435027
5√n 7.3188670641758

Divisors of 21000

1, 2, 4, 5, 8, 10, 20, 21, 25, 40, 42, 50, 84, 100, 105, 125, 168, 200, 210, 250, 420, 500, 525, 840, 1000, 1050, 2100, 2625, 4200, 5250, 10500, 21000

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 -20999
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 21000 can be divided by 32 positive divisors. The sum of these divisors (counting 21000) is 1, the average is 0.03125.

Base conversion 21000

Base System Value
2 Binary 101001000001000
3 Ternary 1001210210
4 Quaternary 11020020
5 Quinary 1133000
6 Senary 241120
8 Octal 51010
10 Decimal 21000
12 Duodecimal 101a0
16 Hexadecimal 5208
20 Vigesimal 2ca0
36 Base36 g7c

Cryptographic Hash Functions

md5 6896521bf2c62949dbdfa65176cc45f9
sha1 a9f9de0fe5a84b10e9c8e75193368ffe7bbd375f
sha256 0c5a34dcbbf1c6db658c12162bb23612446680ac217921bd85fe2b6ea31f9c95
sha512 59217e1e9711ca113fb877e164acb4c58c402c9cf6dbf50f33ef2da69269ef13ca709946f71c31ecda57d29090f4a839bafc5a613e4d66304a60cd27dfc30003
ripemd-160 b4da725eb25b5524ca8461f63f0ded62da16c8c1

21000 as geometric shapes

Circle

Radius = n
Diameter 42000
Circumference 131946.89145077
Area 1385442360.2331

Sphere

Radius = n
Volume 38792386086527
Surface area 5541769440.9324
Circumference 131946.89145077

Square

Length = n
Perimeter 84000
Area 441000000
Diagonal 29698.484809835

Cube

Length = n
Surface area 2646000000
Volume 9261000000000
Space diagonal 36373.066958946

Equilateral Triangle

Length = n
Perimeter 63000
Area 190958601.53447
Altitude 18186.533479473

Triangular Pyramid

Length = n
Surface area 190958601.53447
Volume 1091419316761.4
Height 9899.4949366117