20419105171 has 2 divisors, whose sum is σ = 20419105172. Its totient is φ = 20419105170.

The previous prime is 20419105151. The next prime is 20419105181. The reversal of 20419105171 is 17150191402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20419105171 - 2⁷ = 20419105043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20419105111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10209552585 + 10209552586.

It is an arithmetic number, because the mean of its divisors is an integer number (10209552586).

Almost surely, 2^20419105171 is an apocalyptic number.

20419105171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20419105171 is an equidigital number, since it uses as much as digits as its factorization.

20419105171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 31.

Adding to 20419105171 its reverse (17150191402), we get a palindrome (37569296573).

The spelling of 20419105171 in words is "twenty billion, four hundred nineteen million, one hundred five thousand, one hundred seventy-one".