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Properties of the Number 18356

Eighteen Thousand Three Hundred Fifty-Six

Basics

Value: 18355 → 18356 → 18357

Parity: even

Prime: No

Previous Prime: 18353

Next Prime: 18367

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 2 × 13 × 353

Divisors: 1, 2, 4, 13, 26, 52, 353, 706, 1412, 4589

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011110110100

Octal: 43664

Duodecimal: A758

Hexadecimal: 47b4

Square: 336942736

Square Root: 135.4843164355196

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 n such that Bernoulli number Bn has denominator 1590. A272140
a(0) = 0; for n>0, a(n) = maximal number of regions into which space can be divided by n spheres. A46127
T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101. A260015
Number of partitions p of n such that (number of numbers of the form 5k + 2 in p) is a part of p. A241551
a(n) = number of steps required to reach 0 from F(n+2)-1 by repeatedly subtracting from a natural number the number of ones in its Zeckendorf representation. Here F(n) = the n-th Fibonacci number, F(0) = 0, F(1) = 1, F(2) = 1, F(3) = 2, ... A261081
a(n) = ∑k=0..floor(n/3) |Stirling1(n - 2·k,n - 3·k)|. A357931
Total number of possible standard knight moves on an n X 2n chessboard, if the knight is placed anywhere. A180319
Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101. A260010
Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101. A260013
Number of orbits of the direct square of the alternating group An2 where An acts by conjugation, such that both permutations in a representative pair are of the same conjugacy class in An. A327151