Properties of the Number 18814

Eighteen Thousand Eight Hundred Fourteen

Basics

Value: 18813 → 18814 → 18815

Parity: even

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 23 × 409

Divisors: 1, 2, 23, 46, 409, 818, 9407, 18814

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100101111110

Octal: 44576

Duodecimal: AA7A

Hexadecimal: 497e

Square: 353966596

Square Root: 137.16413525408163

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

Positions of records in A166133. A256404

Number of permutations p of [n] such that for each i in [n] we have: (i>1) and |p(i)-p(i-1)| = 1 or (i<n) and |p(i)-p(i+1)| = 1. A363181

Numbers k for which rank of the elliptic curve y²=x³+k·x is 4. A309031

Numbers n such that A166133(n) sets a new record and also satisfies A166133(n)=A166133(n-1)²-1. A256422

Even composites in A145832 with at least three distinct prime factors. A145916

If p(k) is the k-th prime, then the n-th set of 3 consecutive cousin prime pairs starts at p(a(n)). A95970

If p(k) is the k-th prime, then the n-th set of 4 consecutive cousin prime pairs starts at p(a(n)). A95971

Start with a(1)=1; for n >= 1, a(n+1)=a(n)+a(k) with k=[n-n-th digit of "e"]. If k<0 or k=0, then a(k)=0. A133392

a(n) = 2·prime(n)² - 4. A153480

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 542", based on the 5-celled von Neumann neighborhood. A272811