Properties of the Number 18646

Eighteen Thousand Six Hundred Forty-Six

Basics

Value: 18645 → 18646 → 18647

Parity: even

Prime: No

Previous Prime: 18637

Next Prime: 18661

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 9323

Divisors: 1, 2, 9323, 18646

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100011010110

Octal: 44326

Duodecimal: A95A

Hexadecimal: 48d6

Square: 347673316

Square Root: 136.55035701161677

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 partitions of n into an odd number of parts. A27193

One half of number of non-self-conjugate partitions; also half of number of asymmetric Ferrers graphs with n nodes. A701

Number of partitions of 2n of type EO (see Comments). A236559

a(n) = -n³ + 7·n² - 5·n + 1. A161708

T(n,k) is the number of n-bead necklaces labeled with numbers -k..k allowing reversal, with sum zero with no three beads in a row equal. A209344

Number of integer partitions of n with reverse-alternating product > 1. A347449

Partial sums of A255745. A255766

G.f. satisfies: A(x) = ∑_n>=0 (A(x)ⁿ + 2)ⁿ * xⁿ / (1+2·x)ⁿ⁺¹. A251180

Number of 7-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero with no three beads in a row equal. A209348

Number of length 3 1..(n+2) arrays with no leading partial sum equal to a prime. A254541