13312120020 has 48 divisors (see below), whose sum is σ = 37284051840. Its totient is φ = 3548935296.

The previous prime is 13312120013. The next prime is 13312120049. The reversal of 13312120020 is 2002121331.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208446 + ... + 264714.

It is an arithmetic number, because the mean of its divisors is an integer number (776751080).

Almost surely, 2^13312120020 is an apocalyptic number.

13312120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13312120020 is an abundant number, since it is smaller than the sum of its proper divisors (23971931820).

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

13312120020 is a wasteful number, since it uses less digits than its factorization.

13312120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60224 (or 60222 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 13312120020 its reverse (2002121331), we get a palindrome (15314241351).

The spelling of 13312120020 in words is "thirteen billion, three hundred twelve million, one hundred twenty thousand, twenty".