Adding to 18750 its reverse (5781), we get a triangular number (24531 = T221).
It is a happy number.
18750 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.
It is an Ulam number.
It is a Curzon number.
It is a nialpdrome in base 5.
It is a zygodrome in base 5.
It is a congruent number.
218750 is an apocalyptic number.
18750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 18750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23436).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18750 is an frugal number, since it uses more digits than its factorization.
18750 is an evil number, because the sum of its binary digits is even.
The square root of 18750 is about 136.9306393763. The cubic root of 18750 is about 26.5664642296.
The spelling of 18750 in words is "eighteen thousand, seven hundred fifty".