18575919871 has 2 divisors, whose sum is σ = 18575919872. Its totient is φ = 18575919870.

The previous prime is 18575919853. The next prime is 18575919881. The reversal of 18575919871 is 17891957581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18575919871 - 2⁷ = 18575919743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18575919881) 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 as a sum of consecutive naturals, namely, 9287959935 + 9287959936.

It is an arithmetic number, because the mean of its divisors is an integer number (9287959936).

Almost surely, 2^18575919871 is an apocalyptic number.

18575919871 is a deficient number, since it is larger than the sum of its proper divisors (1).

18575919871 is an equidigital number, since it uses as much as digits as its factorization.

18575919871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6350400, while the sum is 61.

The spelling of 18575919871 in words is "eighteen billion, five hundred seventy-five million, nine hundred nineteen thousand, eight hundred seventy-one".