13213404328 has 16 divisors (see below), whose sum is σ = 25629448500. Its totient is φ = 6378884736.

The previous prime is 13213404301. The next prime is 13213404331. The reversal of 13213404328 is 82340431231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12016105924 + 1197298404 = 109618^2 + 34602^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13213404328.

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, 28476933 + ... + 28477396.

Almost surely, 2^13213404328 is an apocalyptic number.

It is an amenable number.

13213404328 is a deficient number, since it is larger than the sum of its proper divisors (12416044172).

13213404328 is a wasteful number, since it uses less digits than its factorization.

13213404328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56954364 (or 56954360 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 13213404328 its reverse (82340431231), we get a palindrome (95553835559).

The spelling of 13213404328 in words is "thirteen billion, two hundred thirteen million, four hundred four thousand, three hundred twenty-eight".