18005798 has 8 divisors (see below), whose sum is σ = 27070200. Its totient is φ = 8982400.

The previous prime is 18005783. The next prime is 18005807. The reversal of 18005798 is 89750081.

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, 9128 + ... + 10923.

It is an arithmetic number, because the mean of its divisors is an integer number (3383775).

Almost surely, 2^18005798 is an apocalyptic number.

18005798 is a deficient number, since it is larger than the sum of its proper divisors (9064402).

18005798 is a wasteful number, since it uses less digits than its factorization.

18005798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20502.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 18005798 is about 4243.3239329563. The cubic root of 18005798 is about 262.1022753975.

The spelling of 18005798 in words is "eighteen million, five thousand, seven hundred ninety-eight".