18495666 has 48 divisors (see below), whose sum is σ = 46108608. Its totient is φ = 5248800.

The previous prime is 18495661. The next prime is 18495667. The reversal of 18495666 is 66659481.

It is not an unprimeable number, because it can be changed into a prime (18495661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22401 + ... + 23211.

It is an arithmetic number, because the mean of its divisors is an integer number (960596).

Almost surely, 2^18495666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18495666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23054304).

18495666 is an abundant number, since it is smaller than the sum of its proper divisors (27612942).

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

18495666 is a wasteful number, since it uses less digits than its factorization.

18495666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 1004 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 18495666 is about 4300.6587867442. The cubic root of 18495666 is about 264.4579688621.

The spelling of 18495666 in words is "eighteen million, four hundred ninety-five thousand, six hundred sixty-six".