18466668 has 36 divisors (see below), whose sum is σ = 50924328. Its totient is φ = 5595840.

The previous prime is 18466667. The next prime is 18466673. The reversal of 18466668 is 86666481.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (18466667) 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 11 ways as a sum of consecutive naturals, for example, 22921 + ... + 23712.

Almost surely, 2^18466668 is an apocalyptic number.

18466668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18466668 is an abundant number, since it is smaller than the sum of its proper divisors (32457660).

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

18466668 is a wasteful number, since it uses less digits than its factorization.

18466668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46654 (or 46649 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 18466668 is about 4297.2861203322. The cubic root of 18466668 is about 264.3196884774.

The spelling of 18466668 in words is "eighteen million, four hundred sixty-six thousand, six hundred sixty-eight".