13218857386 has 32 divisors (see below), whose sum is σ = 22951434240. Its totient is φ = 5592695856.

The previous prime is 13218857383. The next prime is 13218857417. The reversal of 13218857386 is 68375881231.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13218857383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1863795 + ... + 1870873.

It is an arithmetic number, because the mean of its divisors is an integer number (717232320).

Almost surely, 2^13218857386 is an apocalyptic number.

13218857386 is a deficient number, since it is larger than the sum of its proper divisors (9732576854).

13218857386 is a wasteful number, since it uses less digits than its factorization.

13218857386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8778.

The product of its digits is 1935360, while the sum is 52.

The spelling of 13218857386 in words is "thirteen billion, two hundred eighteen million, eight hundred fifty-seven thousand, three hundred eighty-six".