18668492011 has 8 divisors (see below), whose sum is σ = 20572077680. Its totient is φ = 16831698912.

The previous prime is 18668491981. The next prime is 18668492023. The reversal of 18668492011 is 11029486681.

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 18668492011 - 2¹⁷ = 18668360939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18668490011) 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, 16697556 + ... + 16698673.

It is an arithmetic number, because the mean of its divisors is an integer number (2571509710).

Almost surely, 2^18668492011 is an apocalyptic number.

18668492011 is a deficient number, since it is larger than the sum of its proper divisors (1903585669).

18668492011 is a wasteful number, since it uses less digits than its factorization.

18668492011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33396285.

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 18668492011 in words is "eighteen billion, six hundred sixty-eight million, four hundred ninety-two thousand, eleven".