13031002320 has 160 divisors (see below), whose sum is σ = 46591184640. Its totient is φ = 2951147520.

The previous prime is 13031002307. The next prime is 13031002321. The reversal of 13031002320 is 2320013031.

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 13031002320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031002321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147540 + ... + 218700.

It is an arithmetic number, because the mean of its divisors is an integer number (291194904).

Almost surely, 2^13031002320 is an apocalyptic number.

13031002320 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 13031002320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23295592320).

13031002320 is an abundant number, since it is smaller than the sum of its proper divisors (33560182320).

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

13031002320 is a wasteful number, since it uses less digits than its factorization.

13031002320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71293 (or 71287 counting only the distinct ones).

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

Adding to 13031002320 its reverse (2320013031), we get a palindrome (15351015351).

The spelling of 13031002320 in words is "thirteen billion, thirty-one million, two thousand, three hundred twenty".