Properties of the Number 20833

Twenty Thousand Eight Hundred Thirty-Three

Basics

Value: 20832 → 20833 → 20834

Parity: odd

Prime: No

Previous Prime: 20809

Next Prime: 20849

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 83 × 251

Divisors: 1, 83, 251, 20833

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000101100001

Octal: 50541

Duodecimal: 10081

Hexadecimal: 5161

Square: 434013889

Square Root: 144.33641259224922

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

NSW pseudoprimes: odd composite numbers k such that A002315((k-1)/2) == 1 (mod k). A330276

For each permutation p of {1,2,...,n} define maxjump(p) = max(p(i) - i); a(n) is sum of maxjumps of all p. A18927

Pell pseudoprimes: odd composite numbers n such that P(n)-Kronecker(2,n) is divisible by n. A99011

Intersection of A099011 and A327651. A327652

Relative of Hofstadter Q-sequence: a(n) = max(0, n+20830) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0. A283887

Composite numbers k coprime to 8 such that k divides Pell(k - Kronecker(8,k)), Pell = A000129. A327651

a(n) = 12·n² - 8·n + 1. A185212

a(n) = (2·n³ + 3·n² + n + 3)/3. A188475

Numbers n such that A229964(n) = 3. A229966

Number of ways to place 3 points on an n X n X n triangular grid so that no pair of them has distance sqrt(3). A244501