18666484 has 12 divisors (see below), whose sum is σ = 32984224. Its totient is φ = 9242424.

The previous prime is 18666481. The next prime is 18666497. The reversal of 18666484 is 48466681.

It is a self number, because there is not a number n which added to its sum of digits gives 18666484.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18666481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22242 + ... + 23065.

Almost surely, 2^18666484 is an apocalyptic number.

It is an amenable number.

18666484 is a deficient number, since it is larger than the sum of its proper divisors (14317740).

18666484 is a wasteful number, since it uses less digits than its factorization.

18666484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45414 (or 45412 counting only the distinct ones).

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

The square root of 18666484 is about 4320.4726593279. The cubic root of 18666484 is about 265.2696152366.

The spelling of 18666484 in words is "eighteen million, six hundred sixty-six thousand, four hundred eighty-four".