18485566 has 8 divisors (see below), whose sum is σ = 30249144. Its totient is φ = 8402520.

The previous prime is 18485563. The next prime is 18485587. The reversal of 18485566 is 66558481.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18485563) 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 3 ways as a sum of consecutive naturals, for example, 420105 + ... + 420148.

It is an arithmetic number, because the mean of its divisors is an integer number (3781143).

Almost surely, 2^18485566 is an apocalyptic number.

18485566 is a deficient number, since it is larger than the sum of its proper divisors (11763578).

18485566 is a wasteful number, since it uses less digits than its factorization.

18485566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840266.

The product of its digits is 230400, while the sum is 43.

The square root of 18485566 is about 4299.4843876912. The cubic root of 18485566 is about 264.4098222346.

It can be divided in two parts, 18 and 485566, that added together give a palindrome (485584).

The spelling of 18485566 in words is "eighteen million, four hundred eighty-five thousand, five hundred sixty-six".