12018138 has 32 divisors (see below), whose sum is σ = 26376192. Its totient is φ = 3620400.

The previous prime is 12018107. The next prime is 12018163. The reversal of 12018138 is 83181021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13495 + ... + 14357.

It is an arithmetic number, because the mean of its divisors is an integer number (824256).

Almost surely, 2^12018138 is an apocalyptic number.

12018138 is an abundant number, since it is smaller than the sum of its proper divisors (14358054).

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

12018138 is a wasteful number, since it uses less digits than its factorization.

12018138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 12018138 is about 3466.7186214056. The cubic root of 12018138 is about 229.0581394812.

Adding to 12018138 its reverse (83181021), we get a palindrome (95199159).

It can be divided in two parts, 1201 and 8138, that added together give a palindrome (9339).

The spelling of 12018138 in words is "twelve million, eighteen thousand, one hundred thirty-eight".