Properties of the Number -18643

Eighteen Thousand Six Hundred Forty-Three

Basics

Value: -18644 → -18643 → -18642

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 103 × 181

Divisors: 1, 103, 181, 18643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100100011010011

Octal: -44323

Duodecimal: -A957

Hexadecimal: -48d3

Square: 347561449

Square Root: 136.53937161126822

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

Bessel function Y₀(n) is a monotonically decreasing positive sequence. A46961

Triangle read by rows: T(m,n) is the label of the ending square of an (m,n)-leaper (a generalization of a chess knight) when it can no longer move, starting on a board with squares spirally numbered, starting at 1; 1 <= n < m. Each move is to the lowest-numbered unvisited square. A323750

Number of 6-bead necklaces where each bead is an unlabeled rooted tree, by total number of nodes. A58855

MM-numbers of capturing, non-nesting multiset partitions (with empty parts allowed). A326260

Number of partitions of n that contain more nonprime parts than prime parts. A355158

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 53 ones. A31821

Numbers n such that A002496(n) mod A002496(n-1) is a perfect square. A247592