18061839838 has 8 divisors (see below), whose sum is σ = 30963154032. Its totient is φ = 7740788496.

The previous prime is 18061839823. The next prime is 18061839847. The reversal of 18061839838 is 83893816081.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645065695 + ... + 645065722.

It is an arithmetic number, because the mean of its divisors is an integer number (3870394254).

Almost surely, 2^18061839838 is an apocalyptic number.

18061839838 is a deficient number, since it is larger than the sum of its proper divisors (12901314194).

18061839838 is a wasteful number, since it uses less digits than its factorization.

18061839838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290131426.

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 18061839838 in words is "eighteen billion, sixty-one million, eight hundred thirty-nine thousand, eight hundred thirty-eight".