Properties of the Number 20587

Twenty Thousand Five Hundred Eighty-Seven

Basics

Value: 20586 → 20587 → 20588

Parity: odd

Prime: No

Previous Prime: 20563

Next Prime: 20593

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 7 × 17 × 173

Divisors: 1, 7, 17, 119, 173, 1211, 2941, 20587

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000001101011

Octal: 50153

Duodecimal: BAB7

Hexadecimal: 506b

Square: 423824569

Square Root: 143.48170615099335

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 parts having the same number of distinct prime divisors as n. A300979

G.f. satisfies: A(x) = 1/(1 + x·A(x³)) and also the continued fraction: 1+x·A(x⁴) = [1;1/x,1/x³,1/x⁹,1/x²⁷,...,1/x^{3^(n-1}),...]. A101913

Expansion of e.g.f. ( ∏_k>0 1/(1-x^k)^1/k )^1/(1-x). A356336

Row sums of triangle A182702. A182706

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 493", based on the 5-celled von Neumann neighborhood. A272545

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFS = ZSM-57 H1.5[Al1.5Si34.5O72] starting with a T8 atom. A19175

Smallest nonempty set S containing prime divisors of 4k+1 for each k in S. A20587