18474666 has 64 divisors (see below), whose sum is σ = 44236800. Its totient is φ = 5139120.

The previous prime is 18474637. The next prime is 18474671. The reversal of 18474666 is 66647481.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 96631 + ... + 96821.

It is an arithmetic number, because the mean of its divisors is an integer number (691200).

Almost surely, 2^18474666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18474666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22118400).

18474666 is an abundant number, since it is smaller than the sum of its proper divisors (25762134).

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

18474666 is a wasteful number, since it uses less digits than its factorization.

18474666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 250 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 18474666 is about 4298.2166069197. The cubic root of 18474666 is about 264.3578423328.

The spelling of 18474666 in words is "eighteen million, four hundred seventy-four thousand, six hundred sixty-six".