Properties of the Number 18431

Eighteen Thousand Four Hundred Thirty-One

Basics

Value: 18430 → 18431 → 18432

Parity: odd

Prime: No

Previous Prime: 18427

Next Prime: 18433

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 7 × 2633

Divisors: 1, 7, 2633, 18431

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011111111111

Octal: 43777

Duodecimal: A7BB

Hexadecimal: 47ff

Square: 339701761

Square Root: 135.76081909004526

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

Expansion of (1+x²-x³)/((1-x)*(1-2·x)). A52996

Smallest positive integer not representable as the sum of at most n distinct numbers of form 2^a*3^b. A18899

a(n) = p(0) + p(1) + ... + p(n) - n - 1, where p = partition numbers, A000041. A58682

(p·q - 1)/2 where p and q are consecutive odd primes. A102770

(Product of twin primes - 1)/2. A120876

a(n) = 18·n² - 1. A157910

a(n) = 32·n² - 1. A158563

Record values in A135141. A246347

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 613", based on the 5-celled von Neumann neighborhood. A283293

Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 809", based on the 5-celled von Neumann neighborhood. A286858