18730409239 has 4 divisors (see below), whose sum is σ = 18746515656. Its totient is φ = 18714302824.

The previous prime is 18730409227. The next prime is 18730409261. The reversal of 18730409239 is 93290403781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93290403781 = 126271 ⋅738811.

It is a cyclic number.

It is not a de Polignac number, because 18730409239 - 2¹¹ = 18730407191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18730400239) 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 in 3 ways as a sum of consecutive naturals, for example, 8051464 + ... + 8053789.

It is an arithmetic number, because the mean of its divisors is an integer number (4686628914).

Almost surely, 2^18730409239 is an apocalyptic number.

18730409239 is a deficient number, since it is larger than the sum of its proper divisors (16106417).

18730409239 is a wasteful number, since it uses less digits than its factorization.

18730409239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16106416.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 18730409239 in words is "eighteen billion, seven hundred thirty million, four hundred nine thousand, two hundred thirty-nine".