18538074 has 36 divisors (see below), whose sum is σ = 41195466. Its totient is φ = 6024816.

The previous prime is 18538001. The next prime is 18538099. The reversal of 18538074 is 47083581.

It can be written as a sum of positive squares in only one way, i.e., 18122049 + 416025 = 4257^2 + 645^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33004 + ... + 33560.

Almost surely, 2^18538074 is an apocalyptic number.

18538074 is an abundant number, since it is smaller than the sum of its proper divisors (22657392).

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

18538074 is a wasteful number, since it uses less digits than its factorization.

18538074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 18538074 is about 4305.5863712159. The cubic root of 18538074 is about 264.6599364089.

The spelling of 18538074 in words is "eighteen million, five hundred thirty-eight thousand, seventy-four".