18044040719 has 2 divisors, whose sum is σ = 18044040720. Its totient is φ = 18044040718.

The previous prime is 18044040697. The next prime is 18044040733. The reversal of 18044040719 is 91704044081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18044040719 is a prime.

It is a super-2 number, since 2×18044040719² (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 (18044040779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022020359 + 9022020360.

It is an arithmetic number, because the mean of its divisors is an integer number (9022020360).

Almost surely, 2^18044040719 is an apocalyptic number.

18044040719 is a deficient number, since it is larger than the sum of its proper divisors (1).

18044040719 is an equidigital number, since it uses as much as digits as its factorization.

18044040719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 18044040719 in words is "eighteen billion, forty-four million, forty thousand, seven hundred nineteen".