Properties of the Number 20248

Twenty Thousand Two Hundred Forty-Eight

Basics

Value: 20247 → 20248 → 20249

Parity: even

Prime: No

Previous Prime: 20233

Next Prime: 20249

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 2531

Divisors: 1, 2, 4, 8, 2531, 5062, 10124, 20248

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111100011000

Octal: 47430

Duodecimal: B874

Hexadecimal: 4f18

Square: 409981504

Square Root: 142.29546725036607

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

G.f.: ∑_n>=0 n! * xⁿ * (1+x)ⁿ / ∏_k=1..n (1 + k·x). A229046

Number of partitions of 5n such that cn(0,5) = cn(1,5) = cn(4,5) <= cn(2,5) = cn(3,5). A36884

G.f. satisfies: A(x) = x + d/dx A(x)³/3. A182304

G.f. A(x,y) satisfies: A(x,y) = x * (1 + y·A(x,y)*A'(x,y)) / (1 + A(x,y)*A'(x,y)), where A'(x,y) = d/dx A(x,y). A301930

Position of n-th appearance of 2n in the sequence of prime gaps (A001223). If 2n does not appear at least n times, set a(n) = -1. A356223

Bisection of A002470. A2286

Number of collinear triples in a 3 X n rectangular grid. A57566

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite DAC = Dachiardite Na5[Al5Si19O48].12H2O starting with a T4 atom. A19105

G.f. satisfies: A(x) = 1 + x·A(x)³ / (A(x) - x·A'(x)). A245118

Strong pseudoprimes to base 22. A20248