13220320302 has 96 divisors (see below), whose sum is σ = 33163603200. Its totient is φ = 3728225664.

The previous prime is 13220320291. The next prime is 13220320303. The reversal of 13220320302 is 20302302231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220320303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3132898 + ... + 3137114.

It is an arithmetic number, because the mean of its divisors is an integer number (345454200).

Almost surely, 2^13220320302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13220320302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16581801600).

13220320302 is an abundant number, since it is smaller than the sum of its proper divisors (19943282898).

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

13220320302 is a wasteful number, since it uses less digits than its factorization.

13220320302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550 (or 4547 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 13220320302 its reverse (20302302231), we get a palindrome (33522622533).

The spelling of 13220320302 in words is "thirteen billion, two hundred twenty million, three hundred twenty thousand, three hundred two".