331313202020 has 24 divisors (see below), whose sum is σ = 696087087864. Its totient is φ = 132462544896.

The previous prime is 331313202019. The next prime is 331313202029. The reversal of 331313202020 is 20202313133.

It can be written as a sum of positive squares in 4 ways, for example, as 30967552576 + 300345649444 = 175976^2 + 548038^2 .

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 = 331313201983 and 331313202001.

It is not an unprimeable number, because it can be changed into a prime (331313202029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3877679 + ... + 3962198.

It is an arithmetic number, because the mean of its divisors is an integer number (29003628661).

Almost surely, 2^331313202020 is an apocalyptic number.

It is an amenable number.

331313202020 is an abundant number, since it is smaller than the sum of its proper divisors (364773885844).

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

331313202020 is a wasteful number, since it uses less digits than its factorization.

331313202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841999 (or 7841997 counting only the distinct ones).

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

Adding to 331313202020 its reverse (20202313133), we get a palindrome (351515515153).

The spelling of 331313202020 in words is "three hundred thirty-one billion, three hundred thirteen million, two hundred two thousand, twenty".