Properties of the Number 20612

Twenty Thousand Six Hundred Twelve

Basics

Value: 20611 → 20612 → 20613

Parity: even

Prime: No

Previous Prime: 20611

Next Prime: 20627

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5153

Divisors: 1, 2, 4, 5153, 10306, 20612

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000010000100

Octal: 50204

Duodecimal: BB18

Hexadecimal: 5084

Square: 424854544

Square Root: 143.5687988387449

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 eight fourth powers in exactly eight ways. A345840

Numbers k such that A090086(k), the smallest pseudoprime to base k (not necessarily exceeding k), is a Carmichael number. A293203

G.f.: ∑_k>=0 x^k*(k+1) * ∏_j=1..k ((1 + x^j)/(1 - x^j))². A376852

Number of (7+2) X (n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order. A252726

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 41", based on the 5-celled von Neumann neighborhood. A269874

Smallest nonempty set S containing prime divisors of 7k+8 for each k in S. A20612