Properties of the Number 18824

Eighteen Thousand Eight Hundred Twenty-Four

Basics

Value: 18823 → 18824 → 18825

Parity: even

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 13 × 181

Divisors: 1, 2, 4, 8, 13, 26, 52, 104, 181, 362

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100110001000

Octal: 44610

Duodecimal: AA88

Hexadecimal: 4988

Square: 354342976

Square Root: 137.20058308913997

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

Numbers k such that 2^k - prime(k) is prime. A78583

Number of non-congruent solutions of x² + y² + z² + t² == 0 mod n. A240547

Number of Pythagorean quadruples mod n; i.e., number of solutions to w² + x² + y² = z² mod n. A96018

Number of solutions to x² + y² + z² + t² == n (mod 2·n) for x,y,z,t in [0, 2·n). A229294

Number of binary words of length n with exactly twice as many occurrences of subword 101 as occurrences of subword 010. A303430

Number of maximal 3-independent sets in the 3-dimensional (3, 3, n) grid graph. A231888

Expansion of 1/(1 - x - x²/(1 + x²/(1 + x³/(1 + x⁴/(1 + x⁵/(1 + ...)))))), a continued fraction. A302016

Indices of records in A218344. A354740

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 81", based on the 5-celled von Neumann neighborhood. A270100

Number of non-congruent solutions of x²+y² == z²+w² (mod n). A316148