18726 is nontrivially palindromic in base 5.
It is a sphenic number, since it is the product of 3 distinct primes.
18726 is an admirable number.
It is a plaindrome in base 8.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18726.
It is an unprimeable number.
218726 is an apocalyptic number.
18726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18726 is a wasteful number, since it uses less digits than its factorization.
18726 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3126.
The square root of 18726 is about 136.8429757057. The cubic root of 18726 is about 26.5551243651. Note that the first 3 decimals are identical.
The spelling of 18726 in words is "eighteen thousand, seven hundred twenty-six".