18324142729 has 2 divisors, whose sum is σ = 18324142730. Its totient is φ = 18324142728.

The previous prime is 18324142723. The next prime is 18324142747. The reversal of 18324142729 is 92724142381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15081068025 + 3243074704 = 122805^2 + 56948^2 .

It is a cyclic number.

It is not a de Polignac number, because 18324142729 - 2³ = 18324142721 is a prime.

It is not a weakly prime, because it can be changed into another prime (18324142721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9162071364 + 9162071365.

It is an arithmetic number, because the mean of its divisors is an integer number (9162071365).

Almost surely, 2^18324142729 is an apocalyptic number.

It is an amenable number.

18324142729 is a deficient number, since it is larger than the sum of its proper divisors (1).

18324142729 is an equidigital number, since it uses as much as digits as its factorization.

18324142729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The spelling of 18324142729 in words is "eighteen billion, three hundred twenty-four million, one hundred forty-two thousand, seven hundred twenty-nine".