Properties of the Number 20510

Twenty Thousand Five Hundred Ten

Basics

Value: 20509 → 20510 → 20511

Parity: even

Prime: No

Previous Prime: 20509

Next Prime: 20521

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 7 × 293

Divisors: 1, 2, 5, 7, 10, 14, 35, 70, 293, 586

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101000000011110

Octal: 50036

Duodecimal: BA52

Hexadecimal: 501e

Square: 420660100

Square Root: 143.2131278898691

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

Weird numbers: abundant (A005101) but not pseudoperfect (A005835). A6037

Unitary weird numbers: unitary abundant (A034683) but not unitary pseudoperfect (A293188). A64114

Numbers that are the sum of one or more consecutive squares in more than one way. A130052

Numbers that are sums of 2 or more consecutive squares in more than 1 way. A62681

Number of Catalan words of length n avoiding the pattern 000. A307464

Nonexponential weird numbers: nonexponential abundant numbers (A348604) that are not equal to the sum of any subset of their nonexponential divisors. A348631

Expansion of g/(1 - x³*g²), where g = 1+x·g² is the g.f. of A000108. A391031

McKay-Thompson series of class 6b for the Monster group. A7261

Number of (w,x,y,z) with all terms in {1,...,n} and w<|x-y|+|y-z|. A212692

Triangle read by rows: R*(n,k) (n>=2, k from 2 to n-1 or to 2 if n = 2), where R*(n,k) = number of trees with n nodes and k unlabeled end-nodes. A213262