Properties of the Number 20366

Twenty Thousand Three Hundred Sixty-Six

Basics

Value: 20365 → 20366 → 20367

Parity: even

Prime: No

Previous Prime: 20359

Next Prime: 20369

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 17 × 599

Divisors: 1, 2, 17, 34, 599, 1198, 10183, 20366

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111110001110

Octal: 47616

Duodecimal: B952

Hexadecimal: 4f8e

Square: 414773956

Square Root: 142.70949512909084

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

Expansion of 1/(1 - x³ - x⁴ - x⁵ + x⁸)². A147851

Numbers k such that absolute value of 7^k - k⁷ is prime. A128447

Number of permutations p of [n] with no fixed points and displacement of elements restricted by five: 1 <= |p(i)-i| <= 5. A259778

Squarefree n such that the elliptic curve n·y² = x³ - x arising in the "congruent number" problem has rank 3. A62693

a(n) = n * ∑_d∣n binomial(d+4,5)/d. A343546

a(n) = n*(n⁴ + 10·n³ + 35·n² + 50·n + 144)/120. A51745

Numbers k such that 216·k+108 is a term of A097703 and A007494 and A098240. A98241

Number of tree-like heptagonal systems. A36757

Numbers n such that σ(n) and σ(σ(n)) are both perfect squares. A134263

Largest k such that k! < 2^2ⁿ. A152909