18041719219 has 2 divisors, whose sum is σ = 18041719220. Its totient is φ = 18041719218.

The previous prime is 18041719193. The next prime is 18041719273. The reversal of 18041719219 is 91291714081.

It is a weak prime.

It is an emirp because it is prime and its reverse (91291714081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18041719219 - 2¹¹ = 18041717171 is a prime.

It is a super-2 number, since 2×18041719219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18041719019) 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, 9020859609 + 9020859610.

It is an arithmetic number, because the mean of its divisors is an integer number (9020859610).

Almost surely, 2^18041719219 is an apocalyptic number.

18041719219 is a deficient number, since it is larger than the sum of its proper divisors (1).

18041719219 is an equidigital number, since it uses as much as digits as its factorization.

18041719219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 43.

The spelling of 18041719219 in words is "eighteen billion, forty-one million, seven hundred nineteen thousand, two hundred nineteen".