12808018 has 4 divisors (see below), whose sum is σ = 19212030. Its totient is φ = 6404008.

The previous prime is 12808009. The next prime is 12808039. The reversal of 12808018 is 81080821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81080821 = 41 ⋅1977581.

It can be written as a sum of positive squares in only one way, i.e., 6985449 + 5822569 = 2643^2 + 2413^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202003 + ... + 3202006.

Almost surely, 2^12808018 is an apocalyptic number.

12808018 is a deficient number, since it is larger than the sum of its proper divisors (6404012).

12808018 is an equidigital number, since it uses as much as digits as its factorization.

12808018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6404011.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 12808018 is about 3578.8291381400. The cubic root of 12808018 is about 233.9702521416.

Adding to 12808018 its reverse (81080821), we get a palindrome (93888839).

The spelling of 12808018 in words is "twelve million, eight hundred eight thousand, eighteen".