20157060172717 has 16 divisors (see below), whose sum is σ = 22426984706560. Its totient is φ = 17990929569600.

The previous prime is 20157060172709. The next prime is 20157060172741. The reversal of 20157060172717 is 71727106075102.

It is not a de Polignac number, because 20157060172717 - 2³ = 20157060172709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20157060172747) 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, 20884842 + ... + 21828667.

It is an arithmetic number, because the mean of its divisors is an integer number (1401686544160).

Almost surely, 2^{20157060172717} is an apocalyptic number.

It is an amenable number.

20157060172717 is a deficient number, since it is larger than the sum of its proper divisors (2269924533843).

20157060172717 is a wasteful number, since it uses less digits than its factorization.

20157060172717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42714724.

The product of its (nonzero) digits is 288120, while the sum is 46.

The spelling of 20157060172717 in words is "twenty trillion, one hundred fifty-seven billion, sixty million, one hundred seventy-two thousand, seven hundred seventeen".