Properties of the Number 20926

Twenty Thousand Nine Hundred Twenty-Six

Basics

Value: 20925 → 20926 → 20927

Parity: even

Prime: No

Previous Prime: 20921

Next Prime: 20929

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 10463

Divisors: 1, 2, 10463, 20926

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000110111110

Octal: 50676

Duodecimal: 1013A

Hexadecimal: 51be

Square: 437897476

Square Root: 144.65821787924804

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

Number of M-sequences from multicomplexes on at most 6 variables with no monomial of degree more than n-1. A7625

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7. A252523

Fractional part of e^a(n) is the largest yet. A91560

Number of M-sequences m₀,...,m₄ with m₁ < n. A11820

Triangle a(n,k) of number of M-sequences read by antidiagonals. A7723

Triangle, read by rows, T(n,k) = ∑_j=1..k binomial(n-1, j-1)*binomial(k, j - 1)*(j-1)!. A176122

Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7. A252517

Duplicate of A007625. A11803

Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid. A155240

Number of compositions of 2n into 2n nonnegative parts such that their xor-sum is zero. A372967