18805499 has 8 divisors (see below), whose sum is σ = 19826688. Its totient is φ = 17810280.

The previous prime is 18805489. The next prime is 18805531. The reversal of 18805499 is 99450881.

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

It is a cyclic number.

It is not a de Polignac number, because 18805499 - 2⁸ = 18805243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18805489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4997 + ... + 7910.

It is an arithmetic number, because the mean of its divisors is an integer number (2478336).

Almost surely, 2^18805499 is an apocalyptic number.

18805499 is a deficient number, since it is larger than the sum of its proper divisors (1021189).

18805499 is a wasteful number, since it uses less digits than its factorization.

18805499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12985.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 18805499 is about 4336.5307562613. The cubic root of 18805499 is about 265.9265018261.

The spelling of 18805499 in words is "eighteen million, eight hundred five thousand, four hundred ninety-nine".