20724327171 has 24 divisors (see below), whose sum is σ = 31765814080. Its totient is φ = 13494903912.

The previous prime is 20724327167. The next prime is 20724327179. The reversal of 20724327171 is 17172342702.

20724327171 is a `hidden beast` number, since 20 + 72 + 432 + 71 + 71 = 666.

It is not a de Polignac number, because 20724327171 - 2² = 20724327167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20724327179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 981241 + ... + 1002138.

Almost surely, 2^20724327171 is an apocalyptic number.

20724327171 is a deficient number, since it is larger than the sum of its proper divisors (11041486909).

20724327171 is an equidigital number, since it uses as much as digits as its factorization.

20724327171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983437 (or 1983425 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

Adding to 20724327171 its reverse (17172342702), we get a palindrome (37896669873).

The spelling of 20724327171 in words is "twenty billion, seven hundred twenty-four million, three hundred twenty-seven thousand, one hundred seventy-one".