31993853263347 has 16 divisors (see below), whose sum is σ = 42669790453760. Its totient is φ = 21323576447712.

The previous prime is 31993853263301. The next prime is 31993853263369. The reversal of 31993853263347 is 74336235839913.

It is not a de Polignac number, because 31993853263347 - 2²⁰ = 31993852214771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31993853263747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220241904 + ... + 220387122.

It is an arithmetic number, because the mean of its divisors is an integer number (2666861903360).

Almost surely, 2^{31993853263347} is an apocalyptic number.

31993853263347 is a deficient number, since it is larger than the sum of its proper divisors (10675937190413).

31993853263347 is a wasteful number, since it uses less digits than its factorization.

31993853263347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164202.

The product of its digits is 264539520, while the sum is 66.

The spelling of 31993853263347 in words is "thirty-one trillion, nine hundred ninety-three billion, eight hundred fifty-three million, two hundred sixty-three thousand, three hundred forty-seven".