18059998 has 8 divisors (see below), whose sum is σ = 29552760. Its totient is φ = 8209080.

The previous prime is 18059983. The next prime is 18060017. The reversal of 18059998 is 89995081.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410433 + ... + 410476.

It is an arithmetic number, because the mean of its divisors is an integer number (3694095).

Almost surely, 2^18059998 is an apocalyptic number.

18059998 is a deficient number, since it is larger than the sum of its proper divisors (11492762).

18059998 is a wasteful number, since it uses less digits than its factorization.

18059998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820922.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 18059998 is about 4249.7056368647. The cubic root of 18059998 is about 262.3650002737.

The spelling of 18059998 in words is "eighteen million, fifty-nine thousand, nine hundred ninety-eight".