18564 is nontrivially palindromic in base 16.
It is a plaindrome in base 15.
It is a congruent number.
It is an unprimeable number.
218564 is an apocalyptic number.
18564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 18564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18564 is a wasteful number, since it uses less digits than its factorization.
18564 is an evil number, because the sum of its binary digits is even.
The square root of 18564 is about 136.2497706420. The cubic root of 18564 is about 26.4783256974.
The spelling of 18564 in words is "eighteen thousand, five hundred sixty-four".