18668203405 has 8 divisors (see below), whose sum is σ = 22402908000. Its totient is φ = 14933853456.

The previous prime is 18668203357. The next prime is 18668203427. The reversal of 18668203405 is 50430286681.

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

It is a cyclic number.

It is not a de Polignac number, because 18668203405 - 2¹³ = 18668195213 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 45646 + ... + 198544.

It is an arithmetic number, because the mean of its divisors is an integer number (2800363500).

Almost surely, 2^18668203405 is an apocalyptic number.

It is an amenable number.

18668203405 is a deficient number, since it is larger than the sum of its proper divisors (3734704595).

18668203405 is a wasteful number, since it uses less digits than its factorization.

18668203405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177323.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 18668203405 in words is "eighteen billion, six hundred sixty-eight million, two hundred three thousand, four hundred five".