13220444504244 has 96 divisors (see below), whose sum is σ = 32761134153216. Its totient is φ = 4135041433600.

The previous prime is 13220444504233. The next prime is 13220444504251. The reversal of 13220444504244 is 44240544402231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452724844 + ... + 452754044.

It is an arithmetic number, because the mean of its divisors is an integer number (341261814096).

Almost surely, 2^{13220444504244} 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 13220444504244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16380567076608).

13220444504244 is an abundant number, since it is smaller than the sum of its proper divisors (19540689648972).

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

13220444504244 is a wasteful number, since it uses less digits than its factorization.

13220444504244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35865 (or 35863 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 39.

Adding to 13220444504244 its reverse (44240544402231), we get a palindrome (57460988906475).

The spelling of 13220444504244 in words is "thirteen trillion, two hundred twenty billion, four hundred forty-four million, five hundred four thousand, two hundred forty-four".