18189380239 has 2 divisors, whose sum is σ = 18189380240. Its totient is φ = 18189380238.

The previous prime is 18189380213. The next prime is 18189380311. The reversal of 18189380239 is 93208398181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18189380239 - 2²⁹ = 17652509327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18189680239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9094690119 + 9094690120.

It is an arithmetic number, because the mean of its divisors is an integer number (9094690120).

Almost surely, 2^18189380239 is an apocalyptic number.

18189380239 is a deficient number, since it is larger than the sum of its proper divisors (1).

18189380239 is an equidigital number, since it uses as much as digits as its factorization.

18189380239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 18189380239 in words is "eighteen billion, one hundred eighty-nine million, three hundred eighty thousand, two hundred thirty-nine".