18949168 has 40 divisors (see below), whose sum is σ = 42452640. Its totient is φ = 8025600.

The previous prime is 18949159. The next prime is 18949181. The reversal of 18949168 is 86194981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9018 + ... + 10918.

It is an arithmetic number, because the mean of its divisors is an integer number (1061316).

Almost surely, 2^18949168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18949168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21226320).

18949168 is an abundant number, since it is smaller than the sum of its proper divisors (23503472).

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

18949168 is a wasteful number, since it uses less digits than its factorization.

18949168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005 (or 1999 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 18949168 is about 4353.0642081182. The cubic root of 18949168 is about 266.6019870911.

The spelling of 18949168 in words is "eighteen million, nine hundred forty-nine thousand, one hundred sixty-eight".