18064028309 has 2 divisors, whose sum is σ = 18064028310. Its totient is φ = 18064028308.

The previous prime is 18064028303. The next prime is 18064028347. The reversal of 18064028309 is 90382046081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17121722500 + 942305809 = 130850^2 + 30697^2 .

It is an emirp because it is prime and its reverse (90382046081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18064028309 - 2⁴ = 18064028293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18064028303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9032014154 + 9032014155.

It is an arithmetic number, because the mean of its divisors is an integer number (9032014155).

Almost surely, 2^18064028309 is an apocalyptic number.

It is an amenable number.

18064028309 is a deficient number, since it is larger than the sum of its proper divisors (1).

18064028309 is an equidigital number, since it uses as much as digits as its factorization.

18064028309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 18064028309 in words is "eighteen billion, sixty-four million, twenty-eight thousand, three hundred nine".