18986700209 has 8 divisors (see below), whose sum is σ = 20473464480. Its totient is φ = 17548682400.

The previous prime is 18986700199. The next prime is 18986700217. The reversal of 18986700209 is 90200768981.

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 18986700209 - 2¹⁶ = 18986634673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18986700409) 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 7 ways as a sum of consecutive naturals, for example, 12185807 + ... + 12187364.

It is an arithmetic number, because the mean of its divisors is an integer number (2559183060).

Almost surely, 2^18986700209 is an apocalyptic number.

18986700209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18986700209 is a deficient number, since it is larger than the sum of its proper divisors (1486764271).

18986700209 is a wasteful number, since it uses less digits than its factorization.

18986700209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24373231.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 18986700209 in words is "eighteen billion, nine hundred eighty-six million, seven hundred thousand, two hundred nine".