18663886373 has 8 divisors (see below), whose sum is σ = 21558286080. Its totient is φ = 15969100480.

The previous prime is 18663886361. The next prime is 18663886391. The reversal of 18663886373 is 37368836681.

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 18663886373 - 2⁶ = 18663886309 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 (18663886343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49903253 + ... + 49903626.

It is an arithmetic number, because the mean of its divisors is an integer number (2694785760).

Almost surely, 2^18663886373 is an apocalyptic number.

It is an amenable number.

18663886373 is a deficient number, since it is larger than the sum of its proper divisors (2894399707).

18663886373 is a wasteful number, since it uses less digits than its factorization.

18663886373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99806907.

The product of its digits is 20901888, while the sum is 59.

The spelling of 18663886373 in words is "eighteen billion, six hundred sixty-three million, eight hundred eighty-six thousand, three hundred seventy-three".