31805238093 has 8 divisors (see below), whose sum is σ = 42411261888. Its totient is φ = 21201353184.

The previous prime is 31805238053. The next prime is 31805238139. The reversal of 31805238093 is 39083250813.

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

It is not a de Polignac number, because 31805238093 - 2¹² = 31805233997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31805238013) 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 7 ways as a sum of consecutive naturals, for example, 499696 + ... + 559737.

It is an arithmetic number, because the mean of its divisors is an integer number (5301407736).

Almost surely, 2^31805238093 is an apocalyptic number.

It is an amenable number.

31805238093 is a deficient number, since it is larger than the sum of its proper divisors (10606023795).

31805238093 is a wasteful number, since it uses less digits than its factorization.

31805238093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069443.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 31805238093 in words is "thirty-one billion, eight hundred five million, two hundred thirty-eight thousand, ninety-three".