Properties of the Number 18188

Eighteen Thousand One Hundred Eighty-Eight

Basics

Value: 18187 → 18188 → 18189

Parity: even

Prime: No

Previous Prime: 18181

Next Prime: 18191

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 4547

Divisors: 1, 2, 4, 4547, 9094, 18188

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011100001100

Octal: 43414

Duodecimal: A638

Hexadecimal: 470c

Square: 330803344

Square Root: 134.86289333986574

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

Number of edges in an equal-armed cross with arms of length n (see Comments in A331456 for definition). A333036

Numbers consisting of ones and eights. A213084

Numbers k such that 6·p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)*p(k+5)-1 and 6·p(k)*p(k+1)*p(k+2)*p(k+3)*p(k+4)*p(k+5)+1 are twin primes with p(h) = h-th prime. A129311

Numbers k such that k and k² use only the digits 0, 1, 3, 4 and 8. A136840

Partial sums of A023200. A172112

Expansion of 1/(1 - x/(1 - x⁸/(1 - x²⁷/(1 - x⁶⁴/(1 - x¹²⁵/(1 - x²¹⁶/(1 - ... - x^n³/(1 - ...)))))))), a continued fraction. A291146

Number of minimal total dominating sets in the n-triangular honeycomb bishop graph. A304558

Starting from generation 7 add previous and next term yielding generation 8. A48454

Diagonal sums of a sum-of-powers triangle. A104880

Number of binary strings of length n that can be written as the concatenation of nontrivial powers of other strings. A265642