Adding to 18312 its reverse (21381), we get a palindrome (39693).
It is a happy number.
18312 is nontrivially palindromic in base 13.
It is a nude number because it is divisible by every one of its digits.
It is a plaindrome in base 16.
It is a nialpdrome in base 12.
218312 is an apocalyptic number.
18312 is a gapful number since it is divisible by the number (12) 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 18312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26400).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18312 is a wasteful number, since it uses less digits than its factorization.
18312 is an evil number, because the sum of its binary digits is even.
The square root of 18312 is about 135.3218385923. The cubic root of 18312 is about 26.3579680099.
The spelling of 18312 in words is "eighteen thousand, three hundred twelve".