Properties of the Number 20394

Twenty Thousand Three Hundred Ninety-Four

Basics

Value: 20393 → 20394 → 20395

Parity: even

Prime: No

Previous Prime: 20393

Next Prime: 20399

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 11 × 103

Divisors: 1, 2, 3, 6, 9, 11, 18, 22, 33, 66

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100111110101010

Octal: 47652

Duodecimal: B976

Hexadecimal: 4faa

Square: 415915236

Square Root: 142.80756282494286

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 k and 4·k, taken together, are pandigital. A115924

a(n) = 1458·n - 18. A157508

Number of length-4 0..n arrays with no repeated value greater than or equal to the previous repeated value. A269410

If mod[n,4]=0 then a(n)=a(n-1), if mod[n,4]=1 then a(n)=a(n-2)+a(n-3), if mod[n,4]=2 then a(n)=a(n-3)+a(n-4)+a(n-5), if mod[n,4]=2 then a(n)=a(n-4)+a(n-5)+a(n-6)+a[n-7]. A104205

Numbers k such that (397·10^k + 53)/9 is prime. A295627

Fourier coefficients of the modular form (1/t_6a³) * (1-12·sqrt(-3) / t_6a)^1/6 * F_6a¹⁰. A341566

Numbers k such that the continued fraction for sqrt(k) has period 55. A20394