Properties of the Number 20240

Twenty Thousand Two Hundred Forty

Basics

Value: 20239 → 20240 → 20241

Parity: even

Prime: No

Previous Prime: 20233

Next Prime: 20249

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 5 × 11 × 23

Divisors: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111100010000

Octal: 47420

Duodecimal: B868

Hexadecimal: 4f10

Square: 409657600

Square Root: 142.2673539502299

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

T(n,k)=Number of -k..k arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero. A199832

Number of polyforms with n cells on the faces of a triakis icosahedron up to rotation. A383493

a(n) = ((n⁶ - (n-1)⁶) - (n² - (n-1)²))/60. A79547

Number of ways to write n as an ordered sum of 5 nonprime numbers. A341482

Terms of A177763 which have more than one such representation. A177766

a(n) = (1/4) * ∑_k=0..n (k+2) * 2^k * binomial(2·k+2,2·n-2·k+1). A391832

Column of Motzkin triangle A026300. A5324

Number of partitions of the n-th n-gonal pyramidal number into distinct n-gonal pyramidal numbers. A337798

Triangle read by rows: T(n, k) is the number of chains of length k in the poset of permutations of an n-set. A375835

Values of z in positive integer solutions of x² + y⁵ = z³, listed in increasing order of z. A70067