18000105 has 8 divisors (see below), whose sum is σ = 28800192. Its totient is φ = 9600048.

The previous prime is 18000089. The next prime is 18000137. The reversal of 18000105 is 50100081.

It is a happy number.

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

It is not a de Polignac number, because 18000105 - 2⁴ = 18000089 is a prime.

It is a super-2 number, since 2×18000105² = 648007560022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1200007 = 18000105 / (1 + 8 + 0 + 0 + 0 + 1 + 0 + 5).

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 7 ways as a sum of consecutive naturals, for example, 599989 + ... + 600018.

It is an arithmetic number, because the mean of its divisors is an integer number (3600024).

Almost surely, 2^18000105 is an apocalyptic number.

18000105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18000105 is a deficient number, since it is larger than the sum of its proper divisors (10800087).

18000105 is a wasteful number, since it uses less digits than its factorization.

18000105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200015.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 18000105 is about 4242.6530614699. The cubic root of 18000105 is about 262.0746490085.

Adding to 18000105 its reverse (50100081), we get a palindrome (68100186).

The spelling of 18000105 in words is "eighteen million, one hundred five", and thus it is an aban number.