18109730329 has 2 divisors, whose sum is σ = 18109730330. Its totient is φ = 18109730328.

The previous prime is 18109730293. The next prime is 18109730351. The reversal of 18109730329 is 92303790181.

Together with previous prime (18109730293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13305161104 + 4804569225 = 115348^2 + 69315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18109730329 is a prime.

It is not a weakly prime, because it can be changed into another prime (18109730399) 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, 9054865164 + 9054865165.

It is an arithmetic number, because the mean of its divisors is an integer number (9054865165).

Almost surely, 2^18109730329 is an apocalyptic number.

It is an amenable number.

18109730329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18109730329 is an equidigital number, since it uses as much as digits as its factorization.

18109730329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 18109730329 in words is "eighteen billion, one hundred nine million, seven hundred thirty thousand, three hundred twenty-nine".