13000312320 has 80 divisors (see below), whose sum is σ = 41560398000. Its totient is φ = 3466747904.

The previous prime is 13000312313. The next prime is 13000312337. The reversal of 13000312320 is 2321300031.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 13000312320.

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, 838695 + ... + 854054.

It is an arithmetic number, because the mean of its divisors is an integer number (519504975).

Almost surely, 2^13000312320 is an apocalyptic number.

13000312320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13000312320 is an abundant number, since it is smaller than the sum of its proper divisors (28560085680).

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

13000312320 is an equidigital number, since it uses as much as digits as its factorization.

13000312320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692775 (or 1692759 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 13000312320 its reverse (2321300031), we get a palindrome (15321612351).

The spelling of 13000312320 in words is "thirteen billion, three hundred twelve thousand, three hundred twenty".