It is a tau number, because it is divible by the number of its divisors (128).
It is a congruent number.
It is an unprimeable number.
Almost surely, 218894720 is an apocalyptic number.
18894720 is a gapful number since it is divisible by the number (10) 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 18894720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32472720).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18894720 is a wasteful number, since it uses less digits than its factorization.
18894720 is an evil number, because the sum of its binary digits is even.
The square root of 18894720 is about 4346.8057237470. The cubic root of 18894720 is about 266.3463932754.
The spelling of 18894720 in words is "eighteen million, eight hundred ninety-four thousand, seven hundred twenty".