311330322020 has 48 divisors (see below), whose sum is σ = 657337497600. Its totient is φ = 123857610624.

The previous prime is 311330322019. The next prime is 311330322041. The reversal of 311330322020 is 20223033113.

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 = 311330321983 and 311330322001.

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, 11118077 + ... + 11146043.

It is an arithmetic number, because the mean of its divisors is an integer number (13694531200).

Almost surely, 2^311330322020 is an apocalyptic number.

It is an amenable number.

311330322020 is an abundant number, since it is smaller than the sum of its proper divisors (346007175580).

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

311330322020 is a wasteful number, since it uses less digits than its factorization.

311330322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30972 (or 30970 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 311330322020 its reverse (20223033113), we get a palindrome (331553355133).

The spelling of 311330322020 in words is "three hundred eleven billion, three hundred thirty million, three hundred twenty-two thousand, twenty".