20173831023605 has 32 divisors (see below), whose sum is σ = 29553679885824. Its totient is φ = 12904530702336.

The previous prime is 20173831023583. The next prime is 20173831023637. The reversal of 20173831023605 is 50632013837102.

It is not a de Polignac number, because 20173831023605 - 2⁸ = 20173831023349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149957537 + ... + 150092006.

It is an arithmetic number, because the mean of its divisors is an integer number (923552496432).

Almost surely, 2^{20173831023605} is an apocalyptic number.

It is an amenable number.

20173831023605 is a deficient number, since it is larger than the sum of its proper divisors (9379848862219).

20173831023605 is a wasteful number, since it uses less digits than its factorization.

20173831023605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300049685.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 20173831023605 in words is "twenty trillion, one hundred seventy-three billion, eight hundred thirty-one million, twenty-three thousand, six hundred five".