18006111 has 16 divisors (see below), whose sum is σ = 28245600. Its totient is φ = 11297664.

The previous prime is 18006073. The next prime is 18006113. The reversal of 18006111 is 11160081.

It is not a de Polignac number, because 18006111 - 2⁷ = 18005983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18006113) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 19156 + ... + 20073.

It is an arithmetic number, because the mean of its divisors is an integer number (1765350).

Almost surely, 2^18006111 is an apocalyptic number.

18006111 is a deficient number, since it is larger than the sum of its proper divisors (10239489).

18006111 is a wasteful number, since it uses less digits than its factorization.

18006111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39255 (or 39249 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 18006111 is about 4243.3608142603. The cubic root of 18006111 is about 262.1037941220.

Adding to 18006111 its reverse (11160081), we get a palindrome (29166192).

The spelling of 18006111 in words is "eighteen million, six thousand, one hundred eleven".