13221924688 has 80 divisors (see below), whose sum is σ = 30402804096. Its totient is φ = 5452462080.

The previous prime is 13221924671. The next prime is 13221924701. The reversal of 13221924688 is 88642912231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315495 + ... + 354937.

Almost surely, 2^13221924688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13221924688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15201402048).

13221924688 is an abundant number, since it is smaller than the sum of its proper divisors (17180879408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221924688 is a wasteful number, since it uses less digits than its factorization.

13221924688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39572 (or 39566 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The spelling of 13221924688 in words is "thirteen billion, two hundred twenty-one million, nine hundred twenty-four thousand, six hundred eighty-eight".