18966734785 has 8 divisors (see below), whose sum is σ = 22933823616. Its totient is φ = 15057559920.

The previous prime is 18966734771. The next prime is 18966734821. The reversal of 18966734785 is 58743766981.

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

It is not a de Polignac number, because 18966734785 - 2¹³ = 18966726593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14477769 + ... + 14479078.

It is an arithmetic number, because the mean of its divisors is an integer number (2866727952).

Almost surely, 2^18966734785 is an apocalyptic number.

It is an amenable number.

18966734785 is a deficient number, since it is larger than the sum of its proper divisors (3967088831).

18966734785 is a wasteful number, since it uses less digits than its factorization.

18966734785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28956983.

The product of its digits is 60963840, while the sum is 64.

The spelling of 18966734785 in words is "eighteen billion, nine hundred sixty-six million, seven hundred thirty-four thousand, seven hundred eighty-five".