Properties of the Number 18645

Eighteen Thousand Six Hundred Forty-Five

Basics

Value: 18644 → 18645 → 18646

Parity: odd

Prime: No

Previous Prime: 18637

Next Prime: 18661

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 11 × 113

Divisors: 1, 3, 5, 11, 15, 33, 55, 113, 165, 339

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100100011010101

Octal: 44325

Duodecimal: A959

Hexadecimal: 48d5

Square: 347636025

Square Root: 136.54669530969983

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

Table of coefficients in the iterations of Euler's tree function (A000169), as read by antidiagonals. A274390

Numbers k such that k and 2·k, taken together are pandigital. A115922

E.g.f.: T(T(T(x))), where T(x) = -LambertW(-x) is Euler's tree function (A000169). A227278

Numbers, p, that generate the prime quadruplets p²-2p+2k (for k = -2, -1, 1, 2). A247882

p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S - S² - S³. A291233

Table of coefficients in the iterations of Euler's tree function (A000169), as read by antidiagonals. A274740

Numbers whose base-5 representation contains exactly three 0's and three 4's. A45217

Numbers k such that 67·2^k-1 is prime. A50559

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 0, 1), (1, 1, -1), (1, 1, 1)}. A149575

Table of coefficients in functions that satisfy W_n(x) = W_n-1(x)^W_n(x), with W₀(x) = exp(x), as read by antidiagonals. A274391