Properties of the Number 20318

Twenty Thousand Three Hundred Eighteen

Basics

Value: 20317 → 20318 → 20319

Parity: even

Prime: No

Previous Prime: 20297

Next Prime: 20323

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 10159

Divisors: 1, 2, 10159, 20318

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100111101011110

Octal: 47536

Duodecimal: B912

Hexadecimal: 4f5e

Square: 412821124

Square Root: 142.541222107852

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 p of n such that the multiplicity of min(p)*max(p) is a part. A240498

Numerators of the partial alternating sums of the reciprocals of the Dedekind ψ function (A001615). A357820

a(n) = ∑_k=1..n-1 k²*φ(k) + n²*φ(n)/2, where φ = A000010. A333293

Number of ways to partition n elements into pie slices each with at least 2 elements allowing the pie to be turned over. A32278

Numbers k for which 6k+1, 24k+5, 432k²+72k-1, and 432k²+90k-1 are all prime. A175513

Number of 5 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. A281473

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MOR = Mordenite Na8[Al8Si40O96].24H2O starting with a T2 atom. A19180

Multiplicity of highest weight (or singular) vectors associated with character chi₁₅₈ of Monster module. A34546

Numbers n such that there are precisely 2 groups of order n and 3 of order n + 1. A296025

Partial sums of A108754. A307673