18518105 has 16 divisors (see below), whose sum is σ = 23310720. Its totient is φ = 14095488.

The previous prime is 18518099. The next prime is 18518113. The reversal of 18518105 is 50181581.

It is a cyclic number.

It is not a de Polignac number, because 18518105 - 2¹² = 18514009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32261 + ... + 32829.

It is an arithmetic number, because the mean of its divisors is an integer number (1456920).

Almost surely, 2^18518105 is an apocalyptic number.

It is an amenable number.

18518105 is a deficient number, since it is larger than the sum of its proper divisors (4792615).

18518105 is a wasteful number, since it uses less digits than its factorization.

18518105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its (nonzero) digits is 1600, while the sum is 29.

The square root of 18518105 is about 4303.2667823411. The cubic root of 18518105 is about 264.5648727208.

Adding to 18518105 its reverse (50181581), we get a palindrome (68699686).

The spelling of 18518105 in words is "eighteen million, five hundred eighteen thousand, one hundred five".