13120312020 has 48 divisors (see below), whose sum is σ = 38897869248. Its totient is φ = 3292940800.

The previous prime is 13120311989. The next prime is 13120312033. The reversal of 13120312020 is 2021302131.

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, 6430506 + ... + 6432545.

It is an arithmetic number, because the mean of its divisors is an integer number (810372276).

Almost surely, 2^13120312020 is an apocalyptic number.

13120312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13120312020 is an abundant number, since it is smaller than the sum of its proper divisors (25777557228).

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

13120312020 is a wasteful number, since it uses less digits than its factorization.

13120312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12863080 (or 12863078 counting only the distinct ones).

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

Adding to 13120312020 its reverse (2021302131), we get a palindrome (15141614151).

The spelling of 13120312020 in words is "thirteen billion, one hundred twenty million, three hundred twelve thousand, twenty".