Properties of the Number 18730

Eighteen Thousand Seven Hundred Thirty

Basics

Value: 18729 → 18730 → 18731

Parity: even

Prime: No

Previous Prime: 18719

Next Prime: 18731

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 1873

Divisors: 1, 2, 5, 10, 1873, 3746, 9365, 18730

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100100101010

Octal: 44452

Duodecimal: AA0A

Hexadecimal: 492a

Square: 350812900

Square Root: 136.8575902169843

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

Number of two-rowed partitions of length 3. A1993

Operation count to create all permutations of n distinct elements using the "streamlined" version of Algorithm L (lexicographic permutation generation) from Knuth's The Art of Computer Programming, Vol. 4, chapter 7.2.1.2. Sequence gives number of cases where the j search loop runs beyond j=n-3. A79751

Number of ordered quadruples of integers from [ 1..n ] with no global factor. A15634

G.f. A(x) satisfies: A(x) = (1 + x) * A(x²)²*A(x³)³*A(x⁴)⁴* ... *A(x^k)^k* ... A307605

Second edge diagonal of table A176577. (The first edge diagonal is A099627). A176575

Partial sums of A253090. A255603

Triangle read by rows: T(n,k) = ∑_j=0..k binomial(n,j) * j! (0 <= k <= n). A347667

Squares visited by a knight on a spirally numbered board, moving always to the lowest available unvisited square, or one step back if no unvisited square is available. A323809

Divisors of 935. A18730