20750000171 has 2 divisors, whose sum is σ = 20750000172. Its totient is φ = 20750000170.

The previous prime is 20750000113. The next prime is 20750000179. The reversal of 20750000171 is 17100005702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20750000171 - 2¹⁰ = 20749999147 is a prime.

It is not a weakly prime, because it can be changed into another prime (20750000179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10375000085 + 10375000086.

It is an arithmetic number, because the mean of its divisors is an integer number (10375000086).

Almost surely, 2^20750000171 is an apocalyptic number.

20750000171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20750000171 is an equidigital number, since it uses as much as digits as its factorization.

20750000171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490, while the sum is 23.

Adding to 20750000171 its reverse (17100005702), we get a palindrome (37850005873).

The spelling of 20750000171 in words is "twenty billion, seven hundred fifty million, one hundred seventy-one", and thus it is an aban number.