31887734813 has 8 divisors (see below), whose sum is σ = 35052168096. Its totient is φ = 28767559600.

The previous prime is 31887734737. The next prime is 31887734833. The reversal of 31887734813 is 31843778813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31887734813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31887734833) 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, 11063006 + ... + 11065887.

It is an arithmetic number, because the mean of its divisors is an integer number (4381521012).

Almost surely, 2^31887734813 is an apocalyptic number.

It is an amenable number.

31887734813 is a deficient number, since it is larger than the sum of its proper divisors (3164433283).

31887734813 is a wasteful number, since it uses less digits than its factorization.

31887734813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22129035.

The product of its digits is 2709504, while the sum is 53.

The spelling of 31887734813 in words is "thirty-one billion, eight hundred eighty-seven million, seven hundred thirty-four thousand, eight hundred thirteen".