9931318372 has 12 divisors (see below), whose sum is σ = 17454400236. Its totient is φ = 4944346880.

The previous prime is 9931318351. The next prime is 9931318381. The reversal of 9931318372 is 2738131399.

It can be written as a sum of positive squares in 2 ways, for example, as 2016369216 + 7914949156 = 44904^2 + 88966^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5327029 + ... + 5328892.

It is an arithmetic number, because the mean of its divisors is an integer number (1454533353).

Almost surely, 2^9931318372 is an apocalyptic number.

It is an amenable number.

9931318372 is a deficient number, since it is larger than the sum of its proper divisors (7523081864).

9931318372 is a wasteful number, since it uses less digits than its factorization.

9931318372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10656158 (or 10656156 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The square root of 9931318372 is about 99656.0001806213. Note that the first 3 decimals coincide. The cubic root of 9931318372 is about 2149.4910186538.

The spelling of 9931318372 in words is "nine billion, nine hundred thirty-one million, three hundred eighteen thousand, three hundred seventy-two".