20173287171 has 16 divisors (see below), whose sum is σ = 27201364736. Its totient is φ = 13297442976.

The previous prime is 20173287163. The next prime is 20173287179. The reversal of 20173287171 is 17178237102.

It is an interprime number because it is at equal distance from previous prime (20173287163) and next prime (20173287179).

It is not a de Polignac number, because 20173287171 - 2³ = 20173287163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20173287179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147921 + ... + 249453.

It is an arithmetic number, because the mean of its divisors is an integer number (1700085296).

Almost surely, 2^20173287171 is an apocalyptic number.

20173287171 is a deficient number, since it is larger than the sum of its proper divisors (7028077565).

20173287171 is a wasteful number, since it uses less digits than its factorization.

20173287171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102282.

The product of its (nonzero) digits is 32928, while the sum is 39.

The spelling of 20173287171 in words is "twenty billion, one hundred seventy-three million, two hundred eighty-seven thousand, one hundred seventy-one".