Properties of the Number 20824

Twenty Thousand Eight Hundred Twenty-Four

Basics

Value: 20823 → 20824 → 20825

Parity: even

Prime: No

Previous Prime: 20809

Next Prime: 20849

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 19 × 137

Divisors: 1, 2, 4, 8, 19, 38, 76, 137, 152, 274

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101000101011000

Octal: 50530

Duodecimal: 10074

Hexadecimal: 5158

Square: 433638976

Square Root: 144.30523206037958

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

Starts of runs of 3 consecutive positive negaFibonacci-Niven numbers (A331085). A331087

a(n+2) = 3·a(n+1) + a(n), with a(0) = 1, a(1) = 5. A108300

Sum of parts of the n-th subsection of the head of the last section of the set of partitions of any odd integer >= 2n+1. A182995

Imaginary part of absolute Gaussian perfect numbers, in order of increasing magnitude. A102532

Fifth-order spt function. A221143

Number of fixed polyominoes with n cells of which no four are equally spaced on a straight line. A65068

a(n) = 17·n² - 1. A321180

Coordination sequence for net formed by holes in D₄ lattice. A10079

Numbers k such that (k+1)*φ(k) is a perfect square. A69952

Structured octagonal anti-prism numbers. A100184