31011113020 has 24 divisors (see below), whose sum is σ = 66352081824. Its totient is φ = 12170398656.

The previous prime is 31011112987. The next prime is 31011113027. The reversal of 31011113020 is 2031111013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011113027) 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, 14626824 + ... + 14628943.

It is an arithmetic number, because the mean of its divisors is an integer number (2764670076).

Almost surely, 2^31011113020 is an apocalyptic number.

It is an amenable number.

31011113020 is an abundant number, since it is smaller than the sum of its proper divisors (35340968804).

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

31011113020 is a wasteful number, since it uses less digits than its factorization.

31011113020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29255829 (or 29255827 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 31011113020 its reverse (2031111013), we get a palindrome (33042224033).

The spelling of 31011113020 in words is "thirty-one billion, eleven million, one hundred thirteen thousand, twenty".