13020504320 has 72 divisors (see below), whose sum is σ = 31208936640. Its totient is φ = 5204736000.

The previous prime is 13020504317. The next prime is 13020504347. The reversal of 13020504320 is 2340502031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13020504292 and 13020504301.

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, 2879021 + ... + 2883539.

Almost surely, 2^13020504320 is an apocalyptic number.

13020504320 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 13020504320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15604468320).

13020504320 is an abundant number, since it is smaller than the sum of its proper divisors (18188432320).

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

13020504320 is an equidigital number, since it uses as much as digits as its factorization.

13020504320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6791 (or 6777 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The spelling of 13020504320 in words is "thirteen billion, twenty million, five hundred four thousand, three hundred twenty".