20313111320 has 16 divisors (see below), whose sum is σ = 45704500560. Its totient is φ = 8125244512.

The previous prime is 20313111307. The next prime is 20313111341. The reversal of 20313111320 is 2311131302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253913852 + ... + 253913931.

It is an arithmetic number, because the mean of its divisors is an integer number (2856531285).

Almost surely, 2^20313111320 is an apocalyptic number.

20313111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20313111320 is an abundant number, since it is smaller than the sum of its proper divisors (25391389240).

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

20313111320 is a wasteful number, since it uses less digits than its factorization.

20313111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507827794 (or 507827790 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20313111320 its reverse (2311131302), we get a palindrome (22624242622).

The spelling of 20313111320 in words is "twenty billion, three hundred thirteen million, one hundred eleven thousand, three hundred twenty".