18618648 has 16 divisors (see below), whose sum is σ = 46546680. Its totient is φ = 6206208.

The previous prime is 18618623. The next prime is 18618653. The reversal of 18618648 is 84681681.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387865 + ... + 387912.

Almost surely, 2^18618648 is an apocalyptic number.

It is an amenable number.

18618648 is an abundant number, since it is smaller than the sum of its proper divisors (27928032).

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

18618648 is a wasteful number, since it uses less digits than its factorization.

18618648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775786 (or 775782 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 18618648 is about 4314.9331396906. The cubic root of 18618648 is about 265.0428220819.

The spelling of 18618648 in words is "eighteen million, six hundred eighteen thousand, six hundred forty-eight".