31311331302020 has 96 divisors (see below), whose sum is σ = 84805612174080. Its totient is φ = 9422845770240.

The previous prime is 31311331302001. The next prime is 31311331302077. The reversal of 31311331302020 is 2020313311313.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 350507639 + ... + 350596958.

It is an arithmetic number, because the mean of its divisors is an integer number (883391793480).

Almost surely, 2^{31311331302020} is an apocalyptic number.

It is an amenable number.

31311331302020 is an abundant number, since it is smaller than the sum of its proper divisors (53494280872060).

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

31311331302020 is a wasteful number, since it uses less digits than its factorization.

31311331302020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701104653 (or 701104651 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31311331302020 its reverse (2020313311313), we get a palindrome (33331644613333).

The spelling of 31311331302020 in words is "thirty-one trillion, three hundred eleven billion, three hundred thirty-one million, three hundred two thousand, twenty".