18168662208 has 56 divisors (see below), whose sum is σ = 48611424240. Its totient is φ = 5988167680.

The previous prime is 18168662189. The next prime is 18168662219. The reversal of 18168662208 is 80226686181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

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, 514533 + ... + 548708.

Almost surely, 2^18168662208 is an apocalyptic number.

It is an amenable number.

18168662208 is an abundant number, since it is smaller than the sum of its proper divisors (30442762032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18168662208 is a wasteful number, since it uses less digits than its factorization.

18168662208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063345 (or 1063335 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 18168662208 in words is "eighteen billion, one hundred sixty-eight million, six hundred sixty-two thousand, two hundred eight".