13218812 has 12 divisors (see below), whose sum is σ = 23180976. Its totient is φ = 6595680.

The previous prime is 13218743. The next prime is 13218823. The reversal of 13218812 is 21881231.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088 + ... + 5255.

It is an arithmetic number, because the mean of its divisors is an integer number (1931748).

Almost surely, 2^13218812 is an apocalyptic number.

It is an amenable number.

13218812 is a deficient number, since it is larger than the sum of its proper divisors (9962164).

13218812 is a wasteful number, since it uses less digits than its factorization.

13218812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6868 (or 6866 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 13218812 is about 3635.7684194679. The cubic root of 13218812 is about 236.4453669840.

The spelling of 13218812 in words is "thirteen million, two hundred eighteen thousand, eight hundred twelve".