Properties of the Number 18816

Eighteen Thousand Eight Hundred Sixteen

Basics

Value: 18815 → 18816 → 18817

Parity: even

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ⁷ × 3 × 7 ²

Divisors: 1, 2, 3, 4, 6, 7, 8, 12, 14, 16

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100110000000

Octal: 44600

Duodecimal: AA80

Hexadecimal: 4980

Square: 354041856

Square Root: 137.17142559585798

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

Triangle of coefficients of Laguerre polynomials n!*L_n(x) (rising powers of x). A21009

Sequence S₆ of the S_r family. A92184

T(n,k) is the number of partial bijections of height k (height(α) = |Im(α)|) of an n-element set. A144084

Number T(n,k) of permutations of {1,2,...,n} that result in a binary search tree of height k; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A195581

McKay-Thompson series of class 8E for the Monster group. A29841

Number T(n,k) of permutations of {1,2,...,n} that result in a binary search tree of height k; triangle T(n,k), k>=0, k<=n<=2^k-1, read by columns. A244108

Number of non-attacking placements of 3 rooks on an n X n board. A179058

Triangle of coefficients of Laguerre polynomials L_n(x) (powers of·in decreasing order). A21010

Numbers of multiplicative persistence 5 which are themselves the product of digits of a number. A350184

McKay-Thompson series of class 8D for the Monster group. A112143