13312778218 has 16 divisors (see below), whose sum is σ = 20101608576. Its totient is φ = 6612282720.

The previous prime is 13312778201. The next prime is 13312778243. The reversal of 13312778218 is 81287721331.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734655 + ... + 752557.

It is an arithmetic number, because the mean of its divisors is an integer number (1256350536).

Almost surely, 2^13312778218 is an apocalyptic number.

13312778218 is a deficient number, since it is larger than the sum of its proper divisors (6788830358).

13312778218 is a wasteful number, since it uses less digits than its factorization.

13312778218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20349.

The product of its digits is 112896, while the sum is 43.

The spelling of 13312778218 in words is "thirteen billion, three hundred twelve million, seven hundred seventy-eight thousand, two hundred eighteen".