Properties of the Number 20020

Twenty Thousand Twenty

Basics

Value: 20019 → 20020 → 20021

Parity: even

Prime: No

Previous Prime: 20011

Next Prime: 20021

Digit Sum: 4

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 7 × 11 × 13

Divisors: 1, 2, 4, 5, 7, 10, 11, 13, 14, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111000110100

Octal: 47064

Duodecimal: B704

Hexadecimal: 4e34

Square: 400800400

Square Root: 141.49204924659193

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of strict trees of weight n. A273873

Multiples of 4 whose digits add to 4. A63997

Smallest multiple of n using only digits 0 and 2. A78241

Number of ways to place two nonattacking queens on an n X n board. A36464

Heinz numbers of integer partitions where every partial run (consecutive constant subsequence) has a different sum, and these sums include every integer from 0 to the greatest part. A353867

Heinz numbers of integer partitions with as many even parts as odd conjugate parts and as many odd parts as even conjugate parts. A351980

Numbers whose decimal expansion contains only 0's and 2's. A169965

a(n) = (n+1)*binomial(n+5, 5). A27810

Tenth column (m=9) of (1,6)-Pascal triangle A096956. A97300

G.f. A(x,y) satisfies: A(x,y) + A(1/x,y) = ∑_m>=0 (x^m + y + 1/x^m)^m, ignoring the infinite constant term; this is the triangle, read by rows, of coefficients T(n,k) of xⁿ*y^k in A(x,y) for n >= 1, k = 0..n-1. A316590