31868886813 has 8 divisors (see below), whose sum is σ = 42797546400. Its totient is φ = 21093075888.

The previous prime is 31868886781. The next prime is 31868886821.

31868886813 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 31868886813 - 2⁵ = 31868886781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31868886823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38211678 + ... + 38212511.

It is an arithmetic number, because the mean of its divisors is an integer number (5349693300).

Almost surely, 2^31868886813 is an apocalyptic number.

It is an amenable number.

31868886813 is a deficient number, since it is larger than the sum of its proper divisors (10928659587).

31868886813 is a wasteful number, since it uses less digits than its factorization.

31868886813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76424331.

The product of its digits is 10616832, while the sum is 60.

The spelling of 31868886813 in words is "thirty-one billion, eight hundred sixty-eight million, eight hundred eighty-six thousand, eight hundred thirteen".