Properties of the Number 20708

Twenty Thousand Seven Hundred Eight

Basics

Value: 20707 → 20708 → 20709

Parity: even

Prime: No

Previous Prime: 20707

Next Prime: 20717

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 31 × 167

Divisors: 1, 2, 4, 31, 62, 124, 167, 334, 668, 5177

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000011100100

Octal: 50344

Duodecimal: BB98

Hexadecimal: 50e4

Square: 428821264

Square Root: 143.90274493559878

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

Numbers that are the sum of 4 positive 9th powers. A3393

Numbers that are the sum of 8 nonzero 8th powers. A3386

Sum of the ninth powers of the parts in the partitions of n into two parts. A294276

a(n) = (1/2) * ∑_{|k|<=2·sqrt(p)} k¹⁰*H(4·p-k²) where H() is the Hurwitz class number and p is n-th prime. A297494

Number of partitions of [n] whose blocks are ordered with increasing least elements and where block i (except possibly the last) has size at least i. A362637

Expansion of ∑_k>=0 (k³ * x/(1 - k³ * x))^k. A355469

Numbers that are the sum of at most 5 positive 9th powers. A4889

T(n,k)=Number of idempotent n X n -k..k matrices of rank 1. A221311

Coefficients in the expansion of ([s] + [2s]x + [3s]x² + ...)/([r] + [2r]x + [3r]x² + ...); [ ] = floor, r = e/2, s = r/(1-r). A279633

Numbers that are the sum of at most 4 positive 9th powers. A4888