18484666 has 4 divisors (see below), whose sum is σ = 27727002. Its totient is φ = 9242332.

The previous prime is 18484643. The next prime is 18484667. The reversal of 18484666 is 66648481.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14220441 + 4264225 = 3771^2 + 2065^2 .

It is not an unprimeable number, because it can be changed into a prime (18484667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4621165 + ... + 4621168.

Almost surely, 2^18484666 is an apocalyptic number.

18484666 is a deficient number, since it is larger than the sum of its proper divisors (9242336).

18484666 is an equidigital number, since it uses as much as digits as its factorization.

18484666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9242335.

The product of its digits is 221184, while the sum is 43.

The square root of 18484666 is about 4299.3797227042. The cubic root of 18484666 is about 264.4055310902.

The spelling of 18484666 in words is "eighteen million, four hundred eighty-four thousand, six hundred sixty-six".