18046670729 has 2 divisors, whose sum is σ = 18046670730. Its totient is φ = 18046670728.

The previous prime is 18046670701. The next prime is 18046670737. The reversal of 18046670729 is 92707664081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11347575625 + 6699095104 = 106525^2 + 81848^2 .

It is an emirp because it is prime and its reverse (92707664081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18046670729 - 2¹⁶ = 18046605193 is a prime.

It is not a weakly prime, because it can be changed into another prime (18046670779) 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, 9023335364 + 9023335365.

It is an arithmetic number, because the mean of its divisors is an integer number (9023335365).

Almost surely, 2^18046670729 is an apocalyptic number.

It is an amenable number.

18046670729 is a deficient number, since it is larger than the sum of its proper divisors (1).

18046670729 is an equidigital number, since it uses as much as digits as its factorization.

18046670729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 18046670729 in words is "eighteen billion, forty-six million, six hundred seventy thousand, seven hundred twenty-nine".