Properties of the Number 18706

Eighteen Thousand Seven Hundred Six

Basics

Value: 18705 → 18706 → 18707

Parity: even

Prime: No

Previous Prime: 18701

Next Prime: 18713

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 47 × 199

Divisors: 1, 2, 47, 94, 199, 398, 9353, 18706

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100100100010010

Octal: 44422

Duodecimal: A9AA

Hexadecimal: 4912

Square: 349914436

Square Root: 136.76987972503304

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 partitions of n where the difference between consecutive parts is at most 2. A224956

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0001 0101 or 0111. A259297

Number of compositions of n with equal circular differences up to sign. A325558

Let r, s, t, u be four permutations of the set { 1, 2, 3, ..., n }; a(n) = minimal value of ∑_i=1..n r(i)*s(i)*t(i)*u(i). A70736

Centered pentagonal numbers which are products of three distinct primes. A364610

Numbers n such that h(n) = 3 h(n-1) where h(n) is the length of the sequence {n, f(n), f(f(n)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.) A78420

Expansion of 1/(1+x²-x³+x⁴). A129903

Those terms of A255571 whose every A080541/A080542-rotation is also a term of A255571. A258001

Number of (n+1) X (1+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0001 0101 or 0111. A259290

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101. A260978