Properties of the Number 20736

Twenty Thousand Seven Hundred Thirty-Six

Basics

Value: 20735 → 20736 → 20737

Parity: even

Prime: No

Previous Prime: 20731

Next Prime: 20743

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁸ × 3 ⁴

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000100000000

Octal: 50400

Duodecimal: 10000

Hexadecimal: 5100

Square: 429981696

Square Root: 144

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Fourth powers: a(n) = n⁴. A583

Squared Fibonacci numbers: a(n) = F(n)² where F = A000045. A7598

a(n) = a(n-1) + a(n-3) + a(n-4), a(0) = a(1) = a(2) = 1, a(3) = 2. A6498

Powers of 12. A1021

Partial sums of A001654, or sum of the areas of the first n Fibonacci rectangles. A64831

a(n) = solution to the "Select All, Copy, Paste" problem: Given the ability to type a single letter, or to type individual "Select All", "Copy" or "Paste" command keystrokes, what is the maximal number of letters of text that can be obtained with n keystrokes? A178715

4-full numbers: if a prime p divides k then so does p⁴. A36967

Products of superprimorials (A006939). A181818

Highly powerful numbers: numbers with record value of the product of the exponents in prime factorization (A005361). A5934

12-almost primes (generalization of semiprimes). A69273