18663168 has 72 divisors (see below), whose sum is σ = 52326400. Its totient is φ = 5889024.

The previous prime is 18663167. The next prime is 18663173. The reversal of 18663168 is 86136681.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18663163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13953 + ... + 15231.

Almost surely, 2^18663168 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 18663168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26163200).

18663168 is an abundant number, since it is smaller than the sum of its proper divisors (33663232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18663168 is a wasteful number, since it uses less digits than its factorization.

18663168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317 (or 1303 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 18663168 is about 4320.0888879744. The cubic root of 18663168 is about 265.2539064018.

The spelling of 18663168 in words is "eighteen million, six hundred sixty-three thousand, one hundred sixty-eight".