31313003020 has 24 divisors (see below), whose sum is σ = 70815561264. Its totient is φ = 11561724096.

The previous prime is 31313003009. The next prime is 31313003041. The reversal of 31313003020 is 2030031313.

It is a junction number, because it is equal to n+sod(n) for n = 31313002985 and 31313003003.

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, 60217054 + ... + 60217573.

It is an arithmetic number, because the mean of its divisors is an integer number (2950648386).

Almost surely, 2^31313003020 is an apocalyptic number.

It is an amenable number.

31313003020 is an abundant number, since it is smaller than the sum of its proper divisors (39502558244).

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

31313003020 is a wasteful number, since it uses less digits than its factorization.

31313003020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120434649 (or 120434647 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31313003020 its reverse (2030031313), we get a palindrome (33343034333).

The spelling of 31313003020 in words is "thirty-one billion, three hundred thirteen million, three thousand, twenty".