Properties of the Number 20932

Twenty Thousand Nine Hundred Thirty-Two

Basics

Value: 20931 → 20932 → 20933

Parity: even

Prime: No

Previous Prime: 20929

Next Prime: 20939

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5233

Divisors: 1, 2, 4, 5233, 10466, 20932

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 101000111000100

Octal: 50704

Duodecimal: 10144

Hexadecimal: 51c4

Square: 438148624

Square Root: 144.6789549312546

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

Expansion of 1/(1 - x³ - x⁴ - x⁵ + x⁸). A225482

Triangle read by rows: T(n,k) is the number of permutations of [n] having k strong fixed blocks (see first comment for definition). A186373

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. A304676

Numbers k such that 10^k + 3·R_k + 4 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A102932

Number of permutations of [n] having exactly 3 strong fixed blocks. A225964

a(0) = 1; thereafter a(n) = 10·n² - 5·n + 2. A383466

a(n) = ∑_k=0..n binomial(n,2k)*A002426(k). A162533

Number of (n+1)X(6+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically. A253696

Number of nX6 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. A304674

T(n,n), array T given by A047010. A47012