13220322220 has 96 divisors (see below), whose sum is σ = 32989824000. Its totient is φ = 4354124544.

The previous prime is 13220322169. The next prime is 13220322257. The reversal of 13220322220 is 2222302231.

13220322220 = 428² + 429² + ... + 3412².

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, 799759 + ... + 816121.

It is an arithmetic number, because the mean of its divisors is an integer number (343644000).

Almost surely, 2^13220322220 is an apocalyptic number.

13220322220 is a gapful number since it is divisible by the number (10) 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 13220322220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16494912000).

13220322220 is an abundant number, since it is smaller than the sum of its proper divisors (19769501780).

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

13220322220 is a wasteful number, since it uses less digits than its factorization.

13220322220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16607 (or 16605 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 13220322220 its reverse (2222302231), we get a palindrome (15442624451).

The spelling of 13220322220 in words is "thirteen billion, two hundred twenty million, three hundred twenty-two thousand, two hundred twenty".