Properties of the Number 20626

Twenty Thousand Six Hundred Twenty-Six

Basics

Value: 20625 → 20626 → 20627

Parity: even

Prime: No

Previous Prime: 20611

Next Prime: 20627

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 10313

Divisors: 1, 2, 10313, 20626

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000010010010

Octal: 50222

Duodecimal: BB2A

Hexadecimal: 5092

Square: 425431876

Square Root: 143.6175476743702

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 distinct variances of nonempty subsets of {1, ..., n}. A382383

Expansion of g²/(1 + x³*g³), where g = 1+x·g³ is the g.f. of A001764. A391300

a(n) = T(2·n,n), T given by A026736. A26737

Number of permutations avoiding the patterns {3241,3421,4321}; number of weak sorting class based on 3241. A111279

Triangle read by rows: T(n, k) = ∑_j=0..n C(j, k)*C(j, n - k). A119307

a(n) = 625·n + 1. A158383

Numbers k such that the continued fraction for sqrt(k) has period 69. A20408

a(n) = T(n, floor(n/2)), T given by A026736. A26742

Sum of squares of numbers in row n of array T given by A026736. A27221

Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by more than one. A269584