13211949328 has 20 divisors (see below), whose sum is σ = 25730790748. Its totient is φ = 6571745280.

The previous prime is 13211949299. The next prime is 13211949329. The reversal of 13211949328 is 82394911231.

It can be written as a sum of positive squares in 2 ways, for example, as 6217637904 + 6994311424 = 78852^2 + 83632^2 .

It is not an unprimeable number, because it can be changed into a prime (13211949329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2136153 + ... + 2142328.

Almost surely, 2^13211949328 is an apocalyptic number.

It is an amenable number.

13211949328 is a deficient number, since it is larger than the sum of its proper divisors (12518841420).

13211949328 is a wasteful number, since it uses less digits than its factorization.

13211949328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278682 (or 4278676 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The spelling of 13211949328 in words is "thirteen billion, two hundred eleven million, nine hundred forty-nine thousand, three hundred twenty-eight".