Properties of the Number 20876

Twenty Thousand Eight Hundred Seventy-Six

Basics

Value: 20875 → 20876 → 20877

Parity: even

Prime: No

Previous Prime: 20873

Next Prime: 20879

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 17 × 307

Divisors: 1, 2, 4, 17, 34, 68, 307, 614, 1228, 5219

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 101000110001100

Octal: 50614

Duodecimal: 100B8

Hexadecimal: 518c

Square: 435807376

Square Root: 144.48529336925608

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 k such that k³ divides 3^k² - 1. A129211

Number of integer partitions of n where the parts do not have the same mean as the distinct parts. A360242

Number of relatively prime strict compositions of n with no 1's. A337451

Numbers k that divide the sum of digits of 13^k. A175525

Number of partitions of n in which some but not all parts are equal. A167930

Bisection of A000125. A100503

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 499", based on the 5-celled von Neumann neighborhood. A272562

a(n) = ((5+sqrt(5))/2)ⁿ + ((5-sqrt(5))/2)ⁿ. A20876