Properties of the Number 18825

Eighteen Thousand Eight Hundred Twenty-Five

Basics

Value: 18824 → 18825 → 18826

Parity: odd

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 ² × 251

Divisors: 1, 3, 5, 15, 25, 75, 251, 753, 1255, 3765

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100110001001

Octal: 44611

Duodecimal: AA89

Hexadecimal: 4989

Square: 354380625

Square Root: 137.20422734012243

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

Arithmetic mean of two consecutive prime interprimes of second order: interprimes of third order. A126556

Number of n-length words on {0,1,2,3,4,5} in which 0 appears only in runs of length 2. A255118

Molien series for invariants of finite Coxeter group A₁₀. A266779

a(n) = T(n,2n-6), T given by A027023. A27030

For increasing z > 0, integers, y - x, where x³ + y³ = z³ + 1, with y > x > 1. A259753

Integers k equal to the sum over A000203(t) mod t, for some steps, starting with t = k and then using the result to feed the next calculation. A377001

Number of integer partitions of n with origin-to-boundary graph-distance equal to 4. A384562

Triangle read by rows: coefficients of a Bessel polynomial recursion: P(x, n) = 2*(n-1)*P(x, n - 1)/x - n·P(x, n - 2) with substitution x -> 1/y. A136668

Numbers of the form 56+p² (where p is a prime). A138690

Triangle T(n,k) represents the coefficients of (x¹⁵*d/dx)ⁿ, where n=1,2,3,...; generalization of Stirling numbers of second kind A008277, Lah-numbers A008297. A223517