31113868020 has 48 divisors (see below), whose sum is σ = 87210406080. Its totient is φ = 8288310016.

The previous prime is 31113868013. The next prime is 31113868021. The reversal of 31113868020 is 2086831113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113868021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214890 + ... + 329249.

It is an arithmetic number, because the mean of its divisors is an integer number (1816883460).

Almost surely, 2^31113868020 is an apocalyptic number.

31113868020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31113868020 is an abundant number, since it is smaller than the sum of its proper divisors (56096538060).

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

31113868020 is a wasteful number, since it uses less digits than its factorization.

31113868020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545104 (or 545102 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 31113868020 in words is "thirty-one billion, one hundred thirteen million, eight hundred sixty-eight thousand, twenty".