31313102020 has 48 divisors (see below), whose sum is σ = 66656217600. Its totient is φ = 12354376320.

The previous prime is 31313101969. The next prime is 31313102039. The reversal of 31313102020 is 2020131313.

It is a super-2 number, since 2×31313102020² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31313101985 and 31313102003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1667041 + ... + 1685719.

It is an arithmetic number, because the mean of its divisors is an integer number (1388671200).

Almost surely, 2^31313102020 is an apocalyptic number.

It is an amenable number.

31313102020 is an abundant number, since it is smaller than the sum of its proper divisors (35343115580).

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

31313102020 is a wasteful number, since it uses less digits than its factorization.

31313102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19828 (or 19826 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31313102020 its reverse (2020131313), we get a palindrome (33333233333).

The spelling of 31313102020 in words is "thirty-one billion, three hundred thirteen million, one hundred two thousand, twenty".