31031030020000 has 60 divisors (see below), whose sum is σ = 76340988552906. Its totient is φ = 12412412000000.

The previous prime is 31031030019989. The next prime is 31031030020031. The reversal of 31031030020000 is 2003013013.

It can be written as a sum of positive squares in 5 ways, for example, as 2796132442896 + 28234897577104 = 1672164^2 + 5313652^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 775755751 + ... + 775795750.

Almost surely, 2^{31031030020000} is an apocalyptic number.

It is an amenable number.

31031030020000 is an abundant number, since it is smaller than the sum of its proper divisors (45309958532906).

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

31031030020000 is an equidigital number, since it uses as much as digits as its factorization.

31031030020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551551531 (or 1551551508 counting only the distinct ones).

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

Adding to 31031030020000 its reverse (2003013013), we get a palindrome (31033033033013).

The spelling of 31031030020000 in words is "thirty-one trillion, thirty-one billion, thirty million, twenty thousand".