Properties of the Number 18694

Eighteen Thousand Six Hundred Ninety-Four

Basics

Value: 18693 → 18694 → 18695

Parity: even

Prime: No

Previous Prime: 18691

Next Prime: 18701

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 13 × 719

Divisors: 1, 2, 13, 26, 719, 1438, 9347, 18694

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100100000110

Octal: 44406

Duodecimal: A99A

Hexadecimal: 4906

Square: 349465636

Square Root: 136.72600337902077

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

Triangle T(n,k) read by rows giving number of labeled mappings (or functional digraphs) from n points to themselves (endofunctions) with exactly k cycles, k=1..n. A60281

Successive values·such that the Mordell elliptic curve x³ - y² = d has extremal points with quadratic extension over the rationals. A200656

Coordinates·of Mordell elliptic curves x³-y² for primary extremal points with quadratic extensions over rationals. A201047

Number of functions on n labeled nodes whose representation as a digraph has two components. A65456

Expansion of g.f. A(x) satisfying A(x)² = (1+x) * A(x·A(x)) with A(0) = 0. A367386

Column k=2 of triangle A257673. A321947

a(n) is the smallest k such that A363533(k) = n, or -1 if no such k exists. A363536

The five digits of a(n) and their four successive absolute first differences are all distinct. A365257

Integers k for which the sum of digits of Fibonacci(k) is a Fibonacci number. A383045

Fifth column (m=6) of array A090452. A91026