18668852219 has 4 divisors (see below), whose sum is σ = 19124190120. Its totient is φ = 18213514320.

The previous prime is 18668852183. The next prime is 18668852231. The reversal of 18668852219 is 91225886681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18668852219 - 2⁸ = 18668851963 is a prime.

It is a super-2 number, since 2×18668852219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18668852239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227668889 + ... + 227668970.

It is an arithmetic number, because the mean of its divisors is an integer number (4781047530).

Almost surely, 2^18668852219 is an apocalyptic number.

18668852219 is a deficient number, since it is larger than the sum of its proper divisors (455337901).

18668852219 is an equidigital number, since it uses as much as digits as its factorization.

18668852219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455337900.

The product of its digits is 3317760, while the sum is 56.

The spelling of 18668852219 in words is "eighteen billion, six hundred sixty-eight million, eight hundred fifty-two thousand, two hundred nineteen".