Properties of the Number 18939

Eighteen Thousand Nine Hundred Thirty-Nine

Basics

Value: 18938 → 18939 → 18940

Parity: odd

Prime: No

Previous Prime: 18919

Next Prime: 18947

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 59 × 107

Divisors: 1, 3, 59, 107, 177, 321, 6313, 18939

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100111111011

Octal: 44773

Duodecimal: AB63

Hexadecimal: 49fb

Square: 358685721

Square Root: 137.61903938045782

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) = 441·n² - 394·n + 88. A157734

Principal diagonal of the convolution array A213561. A213562

Number of n-digit bouncy numbers in which every pair of adjacent digits are distinct. A152464

a(n) = 6·binomial(n,4) + 6·binomial(n,3) + 4·binomial(n,2) + 2·n + 1. A385689

Alternating sum of heptagonal pyramidal numbers. A269428

Number of subsets of { 1, ..., n } containing an A.P. of length 8. A18793

Multiplicity of highest weight (or singular) vectors associated with character chi₁₁₁ of Monster module. A34499

Number of n-digit positive integers that undulate. A343462

T(n,k)=Number of (n+3)X(k+3) 0..1 matrices with each 4X4 subblock idempotent. A224568

Continued fraction for e^π - π. A18939