18538328 has 16 divisors (see below), whose sum is σ = 35068680. Its totient is φ = 9186688.

The previous prime is 18538307. The next prime is 18538363. The reversal of 18538328 is 82383581.

It is a junction number, because it is equal to n+sod(n) for n = 18538291 and 18538300.

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, 9350 + ... + 11157.

Almost surely, 2^18538328 is an apocalyptic number.

It is an amenable number.

18538328 is a deficient number, since it is larger than the sum of its proper divisors (16530352).

18538328 is a wasteful number, since it uses less digits than its factorization.

18538328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20626 (or 20622 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 18538328 is about 4305.6158676779. The cubic root of 18538328 is about 264.6611451522.

The spelling of 18538328 in words is "eighteen million, five hundred thirty-eight thousand, three hundred twenty-eight".