Properties of the Number 20422

Twenty Thousand Four Hundred Twenty-Two

Basics

Value: 20421 → 20422 → 20423

Parity: even

Prime: No

Previous Prime: 20411

Next Prime: 20431

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 × 10211

Divisors: 1, 2, 10211, 20422

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111111000110

Octal: 47706

Duodecimal: B99A

Hexadecimal: 4fc6

Square: 417058084

Square Root: 142.90556322271013

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

Number of representations of n as a sum of products of positive integers. 1 is not allowed as a factor, unless it is the only factor. Representations which differ only in the order of terms or factors are considered equivalent. A66739

Iccanobirt prime indices (1 of 15): Indices of prime numbers in A102111. A102131

Number of Dyck paths of knight moves. A5220

Number of non-equivalent ways to choose three points in an equilateral triangle grid of side n. A230723

Expansion of ∏_{1 <= i₁ <= i₂ <= i₃ <= i₄} 1/(1 - x^{i₁*i₂*i₃*i₄}). A321566

a(n) = ceiling((9·n+1/n)ⁿ). A197769

Numbers k such that the continued fraction for sqrt(k) has period 83. A20422

Number of nX5 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. A316950