12990018 has 16 divisors (see below), whose sum is σ = 26346816. Its totient is φ = 4268880.

The previous prime is 12990013. The next prime is 12990041. The reversal of 12990018 is 81009921.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12990013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14821 + ... + 15672.

It is an arithmetic number, because the mean of its divisors is an integer number (1646676).

Almost surely, 2^12990018 is an apocalyptic number.

12990018 is an abundant number, since it is smaller than the sum of its proper divisors (13356798).

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

12990018 is a wasteful number, since it uses less digits than its factorization.

12990018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30569.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 12990018 is about 3604.1667552987. The cubic root of 12990018 is about 235.0732712521.

Adding to 12990018 its reverse (81009921), we get a palindrome (93999939).

The spelling of 12990018 in words is "twelve million, nine hundred ninety thousand, eighteen".