Properties of the Number 18732

Eighteen Thousand Seven Hundred Thirty-Two

Basics

Value: 18731 → 18732 → 18733

Parity: even

Prime: No

Previous Prime: 18731

Next Prime: 18743

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 7 × 223

Divisors: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100100101100

Octal: 44454

Duodecimal: AA10

Hexadecimal: 492c

Square: 350887824

Square Root: 136.864896887405

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

Multiply by 1, add 1, multiply by 2, add 2, etc., start with 1. A19464

Triangles in open triangular matchstick arrangement (triangle minus one side) of side n. A45947

Triangular array T(n,k) giving number of 3-connected graphs with n labeled nodes and k edges (n >= 4, ceiling(3·n/2) <= k <= n(n-1)/2). A123542

Number of matrices of size n whose entries cover an initial interval of positive integers. A323868

G.f. satisfies A(x) = (1+x·A(x)⁴)/(1-x)². A364630

a(n) = n*(4·n² + n - 1)/2. A125200

E.g.f.: 1 + ∑_n>=1 2·exp(n²*x) / 2ⁿ. A249940

Write 0, 1, ..., n in base 3 and add as if they were decimal numbers. A121718

Number of unlabeled loopless multigraphs with n edges covering four vertices. A328652

Sum of orders of all odd permutations of n letters. A60178