18119966 has 8 divisors (see below), whose sum is σ = 27444144. Its totient is φ = 8971920.

The previous prime is 18119963. The next prime is 18119971. The reversal of 18119966 is 66991181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18119963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43775 + ... + 44186.

It is an arithmetic number, because the mean of its divisors is an integer number (3430518).

Almost surely, 2^18119966 is an apocalyptic number.

18119966 is a deficient number, since it is larger than the sum of its proper divisors (9324178).

18119966 is a wasteful number, since it uses less digits than its factorization.

18119966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88066.

The product of its digits is 23328, while the sum is 41.

The square root of 18119966 is about 4256.7553371083. The cubic root of 18119966 is about 262.6550726958.

The spelling of 18119966 in words is "eighteen million, one hundred nineteen thousand, nine hundred sixty-six".