18000838 has 8 divisors (see below), whose sum is σ = 27034488. Its totient is φ = 8989344.

The previous prime is 18000821. The next prime is 18000869. The reversal of 18000838 is 83800081.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3331 + ... + 6862.

It is an arithmetic number, because the mean of its divisors is an integer number (3379311).

Almost surely, 2^18000838 is an apocalyptic number.

18000838 is a deficient number, since it is larger than the sum of its proper divisors (9033650).

18000838 is a wasteful number, since it uses less digits than its factorization.

18000838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11078.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18000838 is about 4242.7394452170. The cubic root of 18000838 is about 262.0782063602.

The spelling of 18000838 in words is "eighteen million, eight hundred thirty-eight", and thus it is an aban number.