12816618 has 24 divisors (see below), whose sum is σ = 26217312. Its totient is φ = 4176984.

The previous prime is 12816607. The next prime is 12816667. The reversal of 12816618 is 81661821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12771 + ... + 13737.

It is an arithmetic number, because the mean of its divisors is an integer number (1092388).

Almost surely, 2^12816618 is an apocalyptic number.

12816618 is an abundant number, since it is smaller than the sum of its proper divisors (13400694).

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

12816618 is an equidigital number, since it uses as much as digits as its factorization.

12816618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1019 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 12816618 is about 3580.0304467979. The cubic root of 12816618 is about 234.0226072102.

The spelling of 12816618 in words is "twelve million, eight hundred sixteen thousand, six hundred eighteen".