31836747868 has 24 divisors (see below), whose sum is σ = 58722965280. Its totient is φ = 15079471680.

The previous prime is 31836747863. The next prime is 31836747869. The reversal of 31836747868 is 86874763813.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31836747863) 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 7 ways as a sum of consecutive naturals, for example, 2583048 + ... + 2595343.

It is an arithmetic number, because the mean of its divisors is an integer number (2446790220).

Almost surely, 2^31836747868 is an apocalyptic number.

It is an amenable number.

31836747868 is a deficient number, since it is larger than the sum of its proper divisors (26886217412).

31836747868 is a wasteful number, since it uses less digits than its factorization.

31836747868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178477 (or 5178475 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 61.

The spelling of 31836747868 in words is "thirty-one billion, eight hundred thirty-six million, seven hundred forty-seven thousand, eight hundred sixty-eight".