13221464704 has 128 divisors (see below), whose sum is σ = 31285440000. Its totient is φ = 5445500928.

The previous prime is 13221464677. The next prime is 13221464713. The reversal of 13221464704 is 40746412231.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 13221464704.

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, 6209112 + ... + 6211240.

It is an arithmetic number, because the mean of its divisors is an integer number (244417500).

Almost surely, 2^13221464704 is an apocalyptic number.

13221464704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13221464704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15642720000).

13221464704 is an abundant number, since it is smaller than the sum of its proper divisors (18063975296).

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

13221464704 is a wasteful number, since it uses less digits than its factorization.

13221464704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418 (or 2406 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

Adding to 13221464704 its reverse (40746412231), we get a palindrome (53967876935).

The spelling of 13221464704 in words is "thirteen billion, two hundred twenty-one million, four hundred sixty-four thousand, seven hundred four".