31706863868 has 12 divisors (see below), whose sum is σ = 55533765672. Its totient is φ = 15840073680.

The previous prime is 31706863843. The next prime is 31706863883. The reversal of 31706863868 is 86836860713.

It is a happy number.

It is a super-3 number, since 3×31706863868³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334223 + ... + 3343718.

It is an arithmetic number, because the mean of its divisors is an integer number (4627813806).

Almost surely, 2^31706863868 is an apocalyptic number.

It is an amenable number.

31706863868 is a deficient number, since it is larger than the sum of its proper divisors (23826901804).

31706863868 is a wasteful number, since it uses less digits than its factorization.

31706863868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6679132 (or 6679130 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 31706863868 in words is "thirty-one billion, seven hundred six million, eight hundred sixty-three thousand, eight hundred sixty-eight".