21887 (number)

21887 is an odd 5-digits composite number following 21886 and preceding 21888. In scientific notation, it is written as 2.1887 × 10^4. The sum of its digits is 26. It has a total of 2 prime factors and 4 positive divisors. There are 21336 positive integers (up to 21887) that are relatively prime to 21887.

Interesting facts

Basic properties

Name

Name twenty-one thousand eight hundred eighty-seven

Notation

Scientific notation 2.1887 × 10^4
Engineering notation 2.1887 × 10^3

Prime Factorization of 21887

Prime Factorization 43 × 509

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21887
Product of the distinct prime numbers

The prime factorization of 21887 is 43 × 509. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 5, 31, 72, 733, 161, 7486, 5616, 2675, 68860, 611826, 3431, 4971332, 1963831, 17753974, 36270054, 228656995, 590134484, 982141298, 3746751316

Basic calculations (n = 21887)

Multiplication

n×y
n×2 43774
n×3 65661
n×4 87548
n×5 109435

Division

n÷y
n÷2 10943.5
n÷3 7295.6666666667
n÷3 5471.75
n÷5 4377.4

Exponentiation

ny
n2 479040769
n3 10484765311103
n4 229480058364111361
n5 5.0226300374153E+21

Nth Root

y√n
2√n 147.94255641971
3√n 27.97233662378
4√n 12.163163914858
5√n 7.3796751973806

Divisors of 21887

1, 43, 509, 21887

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21886
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
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 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21887 can be divided by 4 positive divisors. The sum of these divisors (counting 21887) is 1, the average is 0.25.

Base conversion 21887

Base System Value
2 Binary 101010101111111
3 Ternary 1010000122
4 Quaternary 11111333
5 Quinary 1200022
6 Senary 245155
8 Octal 52577
10 Decimal 21887
12 Duodecimal 107bb
16 Hexadecimal 557f
20 Vigesimal 2ee7
36 Base36 gvz

Cryptographic Hash Functions

md5 b80249f42c48c29edbc0c86465bbaddc
sha1 f55bbaab7c0c855b1e52ed97d9b37bb935572a64
sha256 a19494dad6618da28d948c8991718d649bdd450c161dcc0a2c1256f8c778b6ce
sha512 94696e486d98ab7c5208d8c799f11aa9680a84a10b4adb9e7b5835aa6d7710020e9ba2d436b2472d75fd45a30e6c90986cf9ae091fc93b800f2e8b934d1f0910
ripemd-160 f1e9dba6080794e7c1d04243276082e34ddad5ee

21887 as geometric shapes

Circle

Radius = n
Diameter 43774
Circumference 137520.07681824
Area 1504950960.6604

Sphere

Radius = n
Volume 43918482234632
Surface area 6019803842.6416
Circumference 137520.07681824

Square

Length = n
Perimeter 87548
Area 479040769
Diagonal 30952.89223966

Cube

Length = n
Surface area 2874244614
Volume 10484765311103
Space diagonal 37909.39602526

Equilateral Triangle

Length = n
Perimeter 65661
Area 207430737.70122
Altitude 18954.69801263

Triangular Pyramid

Length = n
Surface area 207430737.70122
Volume 1235641441771.7
Height 10317.630746553