18630498 has 32 divisors (see below), whose sum is σ = 38301120. Its totient is φ = 6039360.

The previous prime is 18630463. The next prime is 18630509. The reversal of 18630498 is 89403681.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 39661 + ... + 40127.

It is an arithmetic number, because the mean of its divisors is an integer number (1196910).

Almost surely, 2^18630498 is an apocalyptic number.

18630498 is an abundant number, since it is smaller than the sum of its proper divisors (19670622).

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

18630498 is a wasteful number, since it uses less digits than its factorization.

18630498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18630498 is about 4316.3060595838. The cubic root of 18630498 is about 265.0990397578.

The spelling of 18630498 in words is "eighteen million, six hundred thirty thousand, four hundred ninety-eight".