Properties of the Number 18807

Eighteen Thousand Eight Hundred Seven

Basics

Value: 18806 → 18807 → 18808

Parity: odd

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 6269

Divisors: 1, 3, 6269, 18807

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100101110111

Octal: 44567

Duodecimal: AA73

Hexadecimal: 4977

Square: 353703249

Square Root: 137.13861600585008

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

Perrin sequence (or Perrin numbers, or Ondrej Such sequence): a(n) = a(n-2) + a(n-3) with a(0) = 3, a(1) = 0, a(2) = 2. A1608

Number of primes less than 10000n. A38813

Number of minimal total dominating sets in the n-cycle graph. A300738

a(n) = round(rⁿ) where r is the smallest Pisot number (real root r=1.3247179.. of x³-x-1). A205579

Number of partitions of n into distinct parts with boundary size 7. A227564

Fourth Lie-Betti number of a path graph on n vertices. A362007

Primonacci numbers: a(n)=a(n-2)+a(n-3)+a(n-5)+a(n-7)+a(n-11)+...+a(n-p(k))+... until n <= p(k), where p(k) is the k-th prime. a(1)=a(2)=1. A78465

Numbers n not divisible by 2 such that n² written in base 4 has no digit > 1. A257284

Number of palindromic compositions of n into prime parts. A276420

a(n) = floor(rⁿ) where r is the smallest Pisot number (real root r=1.3247179... of x³-x-1). A112639