31312130032020 has 48 divisors (see below), whose sum is σ = 87674207842368. Its totient is φ = 8349878127360.

The previous prime is 31312130032019. The next prime is 31312130032021. The reversal of 31312130032020 is 2023003121313.

It is an interprime number because it is at equal distance from previous prime (31312130032019) and next prime (31312130032021).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312130032021) 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, 39144712 + ... + 39936608.

It is an arithmetic number, because the mean of its divisors is an integer number (1826545996716).

Almost surely, 2^{31312130032020} is an apocalyptic number.

31312130032020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31312130032020 is an abundant number, since it is smaller than the sum of its proper divisors (56362077810348).

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

31312130032020 is a wasteful number, since it uses less digits than its factorization.

31312130032020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450920 (or 1450918 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31312130032020 its reverse (2023003121313), we get a palindrome (33335133153333).

The spelling of 31312130032020 in words is "thirty-one trillion, three hundred twelve billion, one hundred thirty million, thirty-two thousand, twenty".