31330302020 has 24 divisors (see below), whose sum is σ = 65796993024. Its totient is φ = 12531481056.

The previous prime is 31330302001. The next prime is 31330302061. The reversal of 31330302020 is 2020303313.

It is a self number, because there is not a number n which added to its sum of digits gives 31330302020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663227 + ... + 708893.

It is an arithmetic number, because the mean of its divisors is an integer number (2741541376).

Almost surely, 2^31330302020 is an apocalyptic number.

It is an amenable number.

31330302020 is an abundant number, since it is smaller than the sum of its proper divisors (34466691004).

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

31330302020 is a wasteful number, since it uses less digits than its factorization.

31330302020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79979 (or 79977 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 31330302020 its reverse (2020303313), we get a palindrome (33350605333).

The spelling of 31330302020 in words is "thirty-one billion, three hundred thirty million, three hundred two thousand, twenty".