Properties of the Number 18339

Eighteen Thousand Three Hundred Thirty-Nine

Basics

Value: 18338 → 18339 → 18340

Parity: odd

Prime: No

Previous Prime: 18329

Next Prime: 18341

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 6113

Divisors: 1, 3, 6113, 18339

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011110100011

Octal: 43643

Duodecimal: A743

Hexadecimal: 47a3

Square: 336318921

Square Root: 135.42156401400774

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

a(n) = p(1)p(n) + p(2)p(n-1) + ... + p(k)p(n+1-k), where k = [ (n+1)/2 ], p = A000040 = the primes. A24697

a(n) = p(1)p(n) + p(2)p(n-1) + ... + p(k)p(n-k+1), where k = [ n/2 ], p = A000040, the primes. A25129

Minimal positive solution a(n) of Diophantine equation a(n)² - a(n)*b(n) - G(n)*b(n)² = +1 or -1 with G(n) := A078358(n). The companion sequence is b(n)=A077058(n). A77057

a(1)=1. a(n) = a(n-1) + sum of the triangular numbers which are among the first (n-1) terms of the sequence. A100963

a(n) = -A292140(n)/2. A292141

Divisors of 220. A18339