It is a nude number because it is divisible by every one of its digits.
It is a nialpdrome in base 8 and base 12.
It is a self number, because there is not a number n which added to its sum of digits gives 18624.
It is a congruent number.
It is an unprimeable number.
218624 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 18624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24892).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18624 is an equidigital number, since it uses as much as digits as its factorization.
18624 is an evil number, because the sum of its binary digits is even.
The square root of 18624 is about 136.4697768739. The cubic root of 18624 is about 26.5068215499.
The spelling of 18624 in words is "eighteen thousand, six hundred twenty-four".