Number 20

Interestingness: 8 · Rank #470 of 1000

Visual representations

Binary image (n×n bits)
Element Ca – Calcium
2²5
Prime factorization

Representations of 20

Greek numeral
κ
Sanskrit numeral
२०
Arabic numeral
٢٠
Roman numeral
XX
Maya numeral
●
ↂ
Chinese numeral
二十
Hebrew numeral
כ
Egyptian numeral
𓎆𓎆
Morse code
..--------

20 in different numeral systems

Binary
10100
Base-3
202
Base-4
110
Base-5
40
Base-6
32
Base-7
26
Base-8
24
Duodecimal
18
Hex
14
Vigesimal
10
Base-24
k
Base-36
k
Negabinary
10100

Factorization

Prime factors: 2, 5
Divisors: 1, 2, 4, 5, 10, 20
Sum of divisors other than 20: 22
Product of prime factors: 20 = 2 × 2 × 5

Number-theory characteristics (6)

Difference of 2 squares Evil number Pronic Even Composite Abundant

Base-10 digit properties (2)

These depend on the decimal representation of the number.

Harshad Duck number

Related primes

Number 20 prime
Prime number before 20
Prime number after 20