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Properties of the Number 18836

Eighteen Thousand Eight Hundred Thirty-Six

Basics

Value: 18835 → 18836 → 18837

Parity: even

Prime: No

Previous Prime: 18803

Next Prime: 18839

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 2 × 17 × 277

Divisors: 1, 2, 4, 17, 34, 68, 277, 554, 1108, 4709

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100110010100

Octal: 44624

Duodecimal: AA98

Hexadecimal: 4994

Square: 354794896

Square Root: 137.2443077143821

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 acute isosceles triangles on an n X n grid. A190317
G.f.: ∑k>=1 x2·k-1/(1-x2·k-1) * ∏k>=1 (1+xk)/(1-xk). A305105
a(n) = 1·prime(n) + 2·prime(n-1) + ... + k·prime(n+1-k), where k=floor((n+1)/2) and prime(n) is the n-th prime. A23870
Numbers k such that 2m == 2 (mod m*(m+1)), where m = A019320(k). A297414
Numbers k such that A019320(k) is in A217465. A297415
Number of binary words of length n with three times as many occurrences of subword 101 as occurrences of subword 010. A307795
Number of (n+2) X (1+2) 0..1 arrays with every 2 X 2 and 3 X 3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically. A253503
Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 1", based on the 5-celled von Neumann neighborhood. A269908
Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 275", based on the 5-celled von Neumann neighborhood. A271093
a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = (primes). A24867