18042339839 has 2 divisors, whose sum is σ = 18042339840. Its totient is φ = 18042339838.

The previous prime is 18042339781. The next prime is 18042339841. The reversal of 18042339839 is 93893324081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18042339839 - 2¹⁶ = 18042274303 is a prime.

Together with 18042339841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18042339869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9021169919 + 9021169920.

It is an arithmetic number, because the mean of its divisors is an integer number (9021169920).

Almost surely, 2^18042339839 is an apocalyptic number.

18042339839 is a deficient number, since it is larger than the sum of its proper divisors (1).

18042339839 is an equidigital number, since it uses as much as digits as its factorization.

18042339839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 18042339839 in words is "eighteen billion, forty-two million, three hundred thirty-nine thousand, eight hundred thirty-nine".