31103030020 has 24 divisors (see below), whose sum is σ = 68754067200. Its totient is φ = 11786411232.

The previous prime is 31103030011. The next prime is 31103030047. The reversal of 31103030020 is 2003030113.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40924660 + ... + 40925419.

It is an arithmetic number, because the mean of its divisors is an integer number (2864752800).

Almost surely, 2^31103030020 is an apocalyptic number.

It is an amenable number.

31103030020 is an abundant number, since it is smaller than the sum of its proper divisors (37651037180).

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

31103030020 is a wasteful number, since it uses less digits than its factorization.

31103030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81850107 (or 81850105 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 31103030020 its reverse (2003030113), we get a palindrome (33106060133).

The spelling of 31103030020 in words is "thirty-one billion, one hundred three million, thirty thousand, twenty".