20127217170255 has 16 divisors (see below), whose sum is σ = 34680743432160. Its totient is φ = 9908783837568.

The previous prime is 20127217170241. The next prime is 20127217170257. The reversal of 20127217170255 is 55207171272102.

It is not a de Polignac number, because 20127217170255 - 2⁸ = 20127217169999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127217170257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51608248960 + ... + 51608249349.

It is an arithmetic number, because the mean of its divisors is an integer number (2167546464510).

Almost surely, 2^{20127217170255} is an apocalyptic number.

20127217170255 is a deficient number, since it is larger than the sum of its proper divisors (14553526261905).

20127217170255 is a wasteful number, since it uses less digits than its factorization.

20127217170255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103216498330.

The product of its (nonzero) digits is 137200, while the sum is 42.

The spelling of 20127217170255 in words is "twenty trillion, one hundred twenty-seven billion, two hundred seventeen million, one hundred seventy thousand, two hundred fifty-five".