31320375668 has 24 divisors (see below), whose sum is σ = 54921598368. Its totient is φ = 15628526496.

The previous prime is 31320375661. The next prime is 31320375677. The reversal of 31320375668 is 86657302313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320375661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4546955 + ... + 4553837.

It is an arithmetic number, because the mean of its divisors is an integer number (2288399932).

Almost surely, 2^31320375668 is an apocalyptic number.

It is an amenable number.

31320375668 is a deficient number, since it is larger than the sum of its proper divisors (23601222700).

31320375668 is a wasteful number, since it uses less digits than its factorization.

31320375668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023 (or 9021 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 31320375668 in words is "thirty-one billion, three hundred twenty million, three hundred seventy-five thousand, six hundred sixty-eight".