18042339838 has 8 divisors (see below), whose sum is σ = 27084031920. Its totient is φ = 9014329200.

The previous prime is 18042339781. The next prime is 18042339839. The reversal of 18042339838 is 83893324081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×18042339838³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18042339791 and 18042339800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042339839) 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 in 3 ways as a sum of consecutive naturals, for example, 3417063 + ... + 3422338.

It is an arithmetic number, because the mean of its divisors is an integer number (3385503990).

Almost surely, 2^18042339838 is an apocalyptic number.

18042339838 is a deficient number, since it is larger than the sum of its proper divisors (9041692082).

18042339838 is a wasteful number, since it uses less digits than its factorization.

18042339838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6840722.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 18042339838 in words is "eighteen billion, forty-two million, three hundred thirty-nine thousand, eight hundred thirty-eight".