18668366835187 has 6 divisors (see below), whose sum is σ = 19515324877412. Its totient is φ = 17856698711412.

The previous prime is 18668366835179. The next prime is 18668366835191. The reversal of 18668366835187 is 78153866386681.

It is not a de Polignac number, because 18668366835187 - 2³ = 18668366835179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18668366835127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17644958673 + ... + 17644959730.

Almost surely, 2^{18668366835187} is an apocalyptic number.

18668366835187 is a deficient number, since it is larger than the sum of its proper divisors (846958042225).

18668366835187 is an equidigital number, since it uses as much as digits as its factorization.

18668366835187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35289918449 (or 35289918426 counting only the distinct ones).

The product of its digits is 1672151040, while the sum is 76.

The spelling of 18668366835187 in words is "eighteen trillion, six hundred sixty-eight billion, three hundred sixty-six million, eight hundred thirty-five thousand, one hundred eighty-seven".