18006688 has 24 divisors (see below), whose sum is σ = 40515552. Its totient is φ = 7717056.

The previous prime is 18006683. The next prime is 18006701. The reversal of 18006688 is 88660081.

It is not an unprimeable number, because it can be changed into a prime (18006683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39970 + ... + 40417.

It is an arithmetic number, because the mean of its divisors is an integer number (1688148).

Almost surely, 2^18006688 is an apocalyptic number.

It is an amenable number.

18006688 is an abundant number, since it is smaller than the sum of its proper divisors (22508864).

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

18006688 is an equidigital number, since it uses as much as digits as its factorization.

18006688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80404 (or 80396 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 18006688 is about 4243.4288022777. The cubic root of 18006688 is about 262.1065937692.

The spelling of 18006688 in words is "eighteen million, six thousand, six hundred eighty-eight".