Properties of the Number 18822

Eighteen Thousand Eight Hundred Twenty-Two

Basics

Value: 18821 → 18822 → 18823

Parity: even

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 3137

Divisors: 1, 2, 3, 6, 3137, 6274, 9411, 18822

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100110000110

Octal: 44606

Duodecimal: AA86

Hexadecimal: 4986

Square: 354267684

Square Root: 137.19329429676947

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 primes of the form x² + 1 < 10ⁿ. A83844

Members of 3-cycles of permutation A111273. A113701

Numbers k such that k and k+1 are both binary Moran numbers (A334344). A334345

Numbers k such that the total number of digits d in the numbers from 1 to k is even for each d from 0 to 9. A380642

Decimal part of cube root of a(n) starts with 6: first term of runs. A34132

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 217", based on the 5-celled von Neumann neighborhood. A270911

Least j such that 6·p(j)*M(n)-1 is prime with p(j)=j-th prime and M(n) = Mersenne prime. A157333

Number of partitions of [n] avoiding the pattern 231. A220912

a(n) is the smallest divisor of triangular number T(n) := n(n+1)/2 not already in the sequence. A111273

G.f.: ∑_n>=0 (xⁿ⁺¹ + i)ⁿ / (1 + i·xⁿ)ⁿ⁺¹, in which the constant term is taken to be 1. A323690