13538018 has 32 divisors (see below), whose sum is σ = 23451120. Its totient is φ = 5806080.

The previous prime is 13538017. The next prime is 13538033. The reversal of 13538018 is 81083531.

13538018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 8684809 + 4853209 = 2947^2 + 2203^2 .

It is not an unprimeable number, because it can be changed into a prime (13538017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48038 + ... + 48318.

Almost surely, 2^13538018 is an apocalyptic number.

13538018 is a deficient number, since it is larger than the sum of its proper divisors (9913102).

13538018 is a wasteful number, since it uses less digits than its factorization.

13538018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 13538018 is about 3679.4045713947. The cubic root of 13538018 is about 238.3334661298. Note that the first 3 decimals are identical.

The spelling of 13538018 in words is "thirteen million, five hundred thirty-eight thousand, eighteen".