Properties of the Number 20715

Twenty Thousand Seven Hundred Fifteen

Basics

Value: 20714 → 20715 → 20716

Parity: odd

Prime: No

Previous Prime: 20707

Next Prime: 20717

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 1381

Divisors: 1, 3, 5, 15, 1381, 4143, 6905, 20715

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000011101011

Octal: 50353

Duodecimal: BBA3

Hexadecimal: 50eb

Square: 429111225

Square Root: 143.92706486272832

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

Sum of 11 positive 9th powers. A4800

Subdiagonal partitions: number of partitions (p1, p2, p3, ...) of n with π <= i. A238875

dot_product(n,n-1,...2,1)*(6,7,...,n,1,2,3,4,5). A26063

Expansion of χ(x)¹⁰ / φ(x)⁴ in powers of·where φ(), χ() are Ramanujan θ functions. A2512

Sum of next n integer interprimes (cf. A024675). A75673

O.g.f. A(x) satisfies: [xⁿ] exp( n² * x ) / A(x) = 0 for n>0. A304322

Number of different, not necessarily connected, labeled trivalent diagrams of size n. A121357

a(n) = n + 6. A20715

Arithmetic mean of next a(n) successive squares of positive integers is a square. A214492