13220032220 has 72 divisors (see below), whose sum is σ = 29119272000. Its totient is φ = 5040532224.

The previous prime is 13220032213. The next prime is 13220032229. The reversal of 13220032220 is 2223002231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220032229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1323806 + ... + 1333754.

Almost surely, 2^13220032220 is an apocalyptic number.

13220032220 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 13220032220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14559636000).

13220032220 is an abundant number, since it is smaller than the sum of its proper divisors (15899239780).

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

13220032220 is a wasteful number, since it uses less digits than its factorization.

13220032220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095 (or 10064 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 13220032220 its reverse (2223002231), we get a palindrome (15443034451).

The spelling of 13220032220 in words is "thirteen billion, two hundred twenty million, thirty-two thousand, two hundred twenty".