13320450520 has 128 divisors (see below), whose sum is σ = 33498360000. Its totient is φ = 4733245440.

The previous prime is 13320450511. The next prime is 13320450541. The reversal of 13320450520 is 2505402331.

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, 5261655 + ... + 5264185.

Almost surely, 2^13320450520 is an apocalyptic number.

13320450520 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 13320450520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16749180000).

13320450520 is an abundant number, since it is smaller than the sum of its proper divisors (20177909480).

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

13320450520 is a wasteful number, since it uses less digits than its factorization.

13320450520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2933 (or 2929 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 13320450520 its reverse (2505402331), we get a palindrome (15825852851).

The spelling of 13320450520 in words is "thirteen billion, three hundred twenty million, four hundred fifty thousand, five hundred twenty".