31873480000 has 140 divisors (see below), whose sum is σ = 79230178852. Its totient is φ = 12718080000.

The previous prime is 31873479961. The next prime is 31873480007. The reversal of 31873480000 is 8437813.

It can be written as a sum of positive squares in 10 ways, for example, as 14521214016 + 17352265984 = 120504^2 + 131728^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31873480007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23079310 + ... + 23080690.

Almost surely, 2^31873480000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31873480000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39615089426).

31873480000 is an abundant number, since it is smaller than the sum of its proper divisors (47356698852).

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

31873480000 is an equidigital number, since it uses as much as digits as its factorization.

31873480000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990 (or 1965 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 31873480000 in words is "thirty-one billion, eight hundred seventy-three million, four hundred eighty thousand".