13220220404 has 24 divisors (see below), whose sum is σ = 23408885640. Its totient is φ = 6532171776.

The previous prime is 13220220373. The next prime is 13220220437. The reversal of 13220220404 is 40402202231.

It can be written as a sum of positive squares in 4 ways, for example, as 1726236304 + 11493984100 = 41548^2 + 107210^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237512 + ... + 287840.

It is an arithmetic number, because the mean of its divisors is an integer number (975370235).

Almost surely, 2^13220220404 is an apocalyptic number.

It is an amenable number.

13220220404 is a deficient number, since it is larger than the sum of its proper divisors (10188665236).

13220220404 is a wasteful number, since it uses less digits than its factorization.

13220220404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51107 (or 51105 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 13220220404 its reverse (40402202231), we get a palindrome (53622422635).

The spelling of 13220220404 in words is "thirteen billion, two hundred twenty million, two hundred twenty thousand, four hundred four".