20368920171 has 32 divisors (see below), whose sum is σ = 28745773056. Its totient is φ = 12808512000.

The previous prime is 20368920163. The next prime is 20368920193. The reversal of 20368920171 is 17102986302.

It is not a de Polignac number, because 20368920171 - 2³ = 20368920163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20368920071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5645250 + ... + 5648856.

It is an arithmetic number, because the mean of its divisors is an integer number (898305408).

Almost surely, 2^20368920171 is an apocalyptic number.

20368920171 is a deficient number, since it is larger than the sum of its proper divisors (8376852885).

20368920171 is a wasteful number, since it uses less digits than its factorization.

20368920171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 20368920171 in words is "twenty billion, three hundred sixty-eight million, nine hundred twenty thousand, one hundred seventy-one".