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Properties of the Number 20748

Twenty Thousand Seven Hundred Forty-Eight

Basics

Value: 20747 → 20748 → 20749

Parity: even

Prime: No

Previous Prime: 20747

Next Prime: 20749

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 2 × 3 × 7 × 13 × 19

Divisors: 1, 2, 3, 4, 6, 7, 12, 13, 14, 19

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000100001100

Octal: 50414

Duodecimal: 10010

Hexadecimal: 510c

Square: 430479504

Square Root: 144.0416606402467

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

Given n colors, sequence gives number of ways to color the vertices of a square such that no edge has the same color on both of its vertices. A91940
Maximal sum of inverse squares of the singular values of triangular anti-Hadamard matrices of order n. A5313
Sums of distinct powers of 12. A33048
Numbers that are the sum of two powers of 12. A194887
Composite numbers with properties that its digits (which may appear with multiplicity) may not appear in any of its factors (wherein the digits may also appear with multiplicity) and the combined digits of the product and the factors must have at least one of each of the ten digits. A370972
Expansion of the 96th root of the series 2·E2(x) - E2(x)2, where E2 is the Eisenstein series of weight 2. A377973
Wiener number of n-hexagonal triangle. A33544
Number of integer-sided hexagons having perimeter n, modulo rotations but not reflections. A293823
Sums of 2 distinct powers of 12. A38492
a(n) = n*(2·n2 + 5·n + 1). A163832