18999498 has 32 divisors (see below), whose sum is σ = 43559424. Its totient is φ = 5411952.

The previous prime is 18999473. The next prime is 18999503. The reversal of 18999498 is 89499981.

It is a happy 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, 22561 + ... + 23387.

It is an arithmetic number, because the mean of its divisors is an integer number (1361232).

Almost surely, 2^18999498 is an apocalyptic number.

18999498 is an abundant number, since it is smaller than the sum of its proper divisors (24559926).

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

18999498 is a wasteful number, since it uses less digits than its factorization.

18999498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its digits is 1679616, while the sum is 57.

The square root of 18999498 is about 4358.8413598111. The cubic root of 18999498 is about 266.8378147855.

The spelling of 18999498 in words is "eighteen million, nine hundred ninety-nine thousand, four hundred ninety-eight".