Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

21000821 (number)

21000821 is an odd 8-digits prime number following 21000820 and preceding 21000822. In scientific notation, it is written as 2.1000821 × 10^7. The sum of its digits is 14. It has a total of 1 prime factors and 2 positive divisors. There are 21000820 positive integers (up to 21000821) that are relatively prime to 21000821.

Interesting facts

21000821 has 2 divisors, whose sum is 21000822
The reverse of 21000821 is 12800012
Previous prime number is 1

Basic properties

Is Prime? yes
Number parity odd
Number length 8
Sum of Digits 14
Digital Root 5

Name

Name	twenty-one million eight hundred twenty-one

Notation

Scientific notation	2.1000821 × 10^7
Engineering notation	2.1000821 × 10^6

Prime Factorization of 21000821

Prime Factorization 21000821

Composite number

ω	Distinct Factors	1	Total number of distinct prime factors
Ω	Total Factors	1	Total number of prime factors
rad	Radical	21000821	Product of the distinct prime numbers

The prime factorization of 21000821 is 21000821. Since it has a total of 1 prime factors.

Most popular turbo-numbers

10, 1, 87, 37, 590, 319, 4195, 6169, 52116, 46951, 918086, 355343, 8700219, 9411482, 8266121, 92419713, 577389060, 253017996, 9932364370, 6122453872

Basic calculations (n = 21000821)

Multiplication

n×y

n×2	42001642
n×3	63002463
n×4	84003284
n×5	105004105

Division

n÷y

n÷2	10500410.5
n÷3	7000273.6666667
n÷3	5250205.25
n÷5	4200164.2

Exponentiation

n^y

n²	441034482674041
n³	9.2620862254651E+21
n⁴	1.9451141490756E+29
n⁵	4.0848994069304E+36

Nth Root

^y√n

²√n	4582.6652725243
³√n	275.89601295118
⁴√n	67.695385902765
⁵√n	29.137162405278

Divisors of 21000821

1, 21000821

2 divisors

τ	Total Divisors	2	Total number of the positive divisors of n
σ	Sum of Divisors	21000822	Sum of all the positive divisors of n
s	Aliquot Sum	1	Sum of the proper positive divisors of n
A	Arithmetic Mean	10500411	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	4582.6653816311	Returns the nth root of the product of n divisors
H	Harmonic Mean	1.9999999047656	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21000821 can be divided by 2 positive divisors. The sum of these divisors (counting 21000821) is 21000822, the average is 10500411.

Base conversion 21000821

Base	System	Value
2	Binary	1010000000111001001110101
3	Ternary	1110111221201012
4	Quaternary	1100013021311
5	Quinary	20334011241
6	Senary	2030042005
8	Octal	120071165
10	Decimal	21000821
12	Duodecimal	7049305
16	Hexadecimal	1407275
20	Vigesimal	6b5211
36	Base36	ci4c5

Cryptographic Hash Functions

md5	845f93c356e6fa3d708df101180f4d1a
sha1	eae2c46802d2321ffadafe13ec6301a7f9550941
sha256	58c5afb8e741cabcb50a4803f3a9ee9aa73fcee4f1607771593271c75259c726
sha512	46bc68e8f2c8402412362416d0b2122580fc366a18c43e8ac516138579bc92059b1b17343b88d402e3121d05214f16f25aa4e07499acbc5e096c2d575e9cc513
ripemd-160	249248bd3782049d3164d899b0752449a96e563c

21000821 as geometric shapes

Circle

Radius = n

Diameter	42001642
Circumference	131952049.94591
Area	1.3855506907485E+15

Sphere

Radius = n

Volume	3.8796936057115E+22
Surface area	5.5422027629942E+15
Circumference	131952049.94591

Square

Length = n

Perimeter	84003284
Area	441034482674041
Diagonal	29699645.87917

Cube

Length = n

Surface area	2646206896044246
Volume	9.2620862254651E+21
Space diagonal	36374488.972659

Equilateral Triangle

Length = n

Perimeter	63002463
Area	1.9097353297032E+14
Altitude	18187244.48633

Triangular Pyramid

Length = n

Surface area	1.9097353297032E+14
Volume	1.0915473296602E+21
Height	9899881.9597232