18019194719 has 2 divisors, whose sum is σ = 18019194720. Its totient is φ = 18019194718.

The previous prime is 18019194707. The next prime is 18019194793. The reversal of 18019194719 is 91749191081.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18019194719 - 2⁴ = 18019194703 is a prime.

It is a super-2 number, since 2×18019194719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18019190719) 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, 9009597359 + 9009597360.

It is an arithmetic number, because the mean of its divisors is an integer number (9009597360).

Almost surely, 2^18019194719 is an apocalyptic number.

18019194719 is a deficient number, since it is larger than the sum of its proper divisors (1).

18019194719 is an equidigital number, since it uses as much as digits as its factorization.

18019194719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 50.

The spelling of 18019194719 in words is "eighteen billion, nineteen million, one hundred ninety-four thousand, seven hundred nineteen".