18117105 has 16 divisors (see below), whose sum is σ = 29139264. Its totient is φ = 9611840.

The previous prime is 18117101. The next prime is 18117119. The reversal of 18117105 is 50171181.

It is not a de Polignac number, because 18117105 - 2² = 18117101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18117101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111 + ... + 6020.

It is an arithmetic number, because the mean of its divisors is an integer number (1821204).

Almost surely, 2^18117105 is an apocalyptic number.

18117105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18117105 is a deficient number, since it is larger than the sum of its proper divisors (11022159).

18117105 is a wasteful number, since it uses less digits than its factorization.

18117105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6336.

The product of its (nonzero) digits is 280, while the sum is 24.

The square root of 18117105 is about 4256.4192697618. The cubic root of 18117105 is about 262.6412482453.

Adding to 18117105 its reverse (50171181), we get a palindrome (68288286).

The spelling of 18117105 in words is "eighteen million, one hundred seventeen thousand, one hundred five".