Properties of the Number 20822

Twenty Thousand Eight Hundred Twenty-Two

Basics

Value: 20821 → 20822 → 20823

Parity: even

Prime: No

Previous Prime: 20809

Next Prime: 20849

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 29 × 359

Divisors: 1, 2, 29, 58, 359, 718, 10411, 20822

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000101010110

Octal: 50526

Duodecimal: 10072

Hexadecimal: 5156

Square: 433555684

Square Root: 144.29830213831346

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 x*(4+9·x-7·x²) / ((1-x)*(1+3·x-x²)). A134250

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

Number of ways to choose disjoint strict rooted partitions of each part in a strict rooted partition of n. A301756

Even numbers k such that if a person is born in year k and lives not more than 100 years, then he never celebrates his prime birthday on a prime year. A124658

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0), (1, 1, 1)}. A151016

Decimal expansion of 1/sqrt(65). A20822

Number of nX6 0..1 arrays with every element unequal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A317739