18103648 has 24 divisors (see below), whose sum is σ = 36402912. Its totient is φ = 8858496.

The previous prime is 18103639. The next prime is 18103663. The reversal of 18103648 is 84630181.

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, 4515 + ... + 7522.

It is an arithmetic number, because the mean of its divisors is an integer number (1516788).

Almost surely, 2^18103648 is an apocalyptic number.

It is an amenable number.

18103648 is an abundant number, since it is smaller than the sum of its proper divisors (18299264).

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

18103648 is a wasteful number, since it uses less digits than its factorization.

18103648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12094 (or 12086 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18103648 is about 4254.8381872875. The cubic root of 18103648 is about 262.5762040284.

The spelling of 18103648 in words is "eighteen million, one hundred three thousand, six hundred forty-eight".