18664268 has 24 divisors (see below), whose sum is σ = 38035872. Its totient is φ = 7847424.

The previous prime is 18664259. The next prime is 18664273. The reversal of 18664268 is 86246681.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4805 + ... + 7772.

It is an arithmetic number, because the mean of its divisors is an integer number (1584828).

Almost surely, 2^18664268 is an apocalyptic number.

It is an amenable number.

18664268 is an abundant number, since it is smaller than the sum of its proper divisors (19371604).

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

18664268 is a wasteful number, since it uses less digits than its factorization.

18664268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12641 (or 12639 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 18664268 is about 4320.2161982938. The cubic root of 18664268 is about 265.2591176208.

The spelling of 18664268 in words is "eighteen million, six hundred sixty-four thousand, two hundred sixty-eight".