18111145 has 16 divisors (see below), whose sum is σ = 23708160. Its totient is φ = 13201344.

The previous prime is 18111139. The next prime is 18111157. The reversal of 18111145 is 54111181.

It is not a de Polignac number, because 18111145 - 2⁹ = 18110633 is a prime.

It is a super-2 number, since 2×18111145² = 656027146422050, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 3372 + ... + 6898.

It is an arithmetic number, because the mean of its divisors is an integer number (1481760).

Almost surely, 2^18111145 is an apocalyptic number.

It is an amenable number.

18111145 is a deficient number, since it is larger than the sum of its proper divisors (5597015).

18111145 is a wasteful number, since it uses less digits than its factorization.

18111145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624.

The product of its digits is 160, while the sum is 22.

The square root of 18111145 is about 4255.7190931733. The cubic root of 18111145 is about 262.6124446456.

The spelling of 18111145 in words is "eighteen million, one hundred eleven thousand, one hundred forty-five".