13312232320 has 64 divisors (see below), whose sum is σ = 31933621440. Its totient is φ = 5306644480.

The previous prime is 13312232317. The next prime is 13312232341. The reversal of 13312232320 is 2323221331.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 13312232291 and 13312232300.

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, 152025 + ... + 223015.

It is an arithmetic number, because the mean of its divisors is an integer number (498962835).

Almost surely, 2^13312232320 is an apocalyptic number.

13312232320 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 13312232320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15966810720).

13312232320 is an abundant number, since it is smaller than the sum of its proper divisors (18621389120).

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

13312232320 is an equidigital number, since it uses as much as digits as its factorization.

13312232320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71303 (or 71291 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 13312232320 its reverse (2323221331), we get a palindrome (15635453651).

The spelling of 13312232320 in words is "thirteen billion, three hundred twelve million, two hundred thirty-two thousand, three hundred twenty".