Properties of the Number 20750

Twenty Thousand Seven Hundred Fifty

Basics

Value: 20749 → 20750 → 20751

Parity: even

Prime: No

Previous Prime: 20749

Next Prime: 20753

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 ³ × 83

Divisors: 1, 2, 5, 10, 25, 50, 83, 125, 166, 250

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 101000100001110

Octal: 50416

Duodecimal: 10012

Hexadecimal: 510e

Square: 430562500

Square Root: 144.04860290887933

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

Numbers k such that φ(k) | sigma₁₀(k). A15768

Number of partitions of n*(n-1)/2 into at most three parts. A274233

a(n) is the determinant of the 2 X 2 matrix whose entries (when read by rows) are the n-th primes congruent to 1, 3, 5, 7 mod 8 respectively. A337145

Pisot sequence T(5,9), a(n) = floor(a(n-1)²/a(n-2)). A20750

a(n) = 15·4ⁿ + 70·2ⁿ + 35·3ⁿ + 5ⁿ⁺¹ + 6ⁿ + 126. A254467