Properties of the Number 20886

Twenty Thousand Eight Hundred Eighty-Six

Basics

Value: 20885 → 20886 → 20887

Parity: even

Prime: No

Previous Prime: 20879

Next Prime: 20887

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 59 ²

Divisors: 1, 2, 3, 6, 59, 118, 177, 354, 3481, 6962

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000110010110

Octal: 50626

Duodecimal: 10106

Hexadecimal: 5196

Square: 436224996

Square Root: 144.5198948242075

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 7th powers. A3371

Number of primes of the form 1 + b⁸ for 1 < b < 10ⁿ. A215049

Numbers k such that σ(k) = ψ(k) + τ(k). A387953

Array read by antidiagonals: T(n,k) = number of rooted n-dimensional polycubes with k cells, with no symmetries removed (n >= 1, k >= 1). A48790

Aliquot sequence starting at 138. A8888

Number of rooted polycubes with n cells, with no symmetries removed. A48663

Aliquot sequence starting at 150. A8889

Numbers k such that s(k) = 2·k, where s(k) is the sum of divisors of k that have a square factor (A162296). A322609

G.f. A(x) satisfies A(x) = 1 + ∑_n>=1 A(x)ⁿ * xⁿ/(1 - x^2·n). A192401

Aliquot sequence starting at 168. A8890