18111125 has 8 divisors (see below), whose sum is σ = 22602840. Its totient is φ = 14488800.

The previous prime is 18111101. The next prime is 18111131. The reversal of 18111125 is 52111181.

It can be written as a sum of positive squares in 4 ways, for example, as 209764 + 17901361 = 458^2 + 4231^2 .

It is not a de Polignac number, because 18111125 - 2⁶ = 18111061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18111097 and 18111106.

It is a congruent number.

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, 72320 + ... + 72569.

It is an arithmetic number, because the mean of its divisors is an integer number (2825355).

Almost surely, 2^18111125 is an apocalyptic number.

It is an amenable number.

18111125 is a deficient number, since it is larger than the sum of its proper divisors (4491715).

18111125 is an equidigital number, since it uses as much as digits as its factorization.

18111125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144904 (or 144894 counting only the distinct ones).

The product of its digits is 80, while the sum is 20.

The square root of 18111125 is about 4255.7167433935. The cubic root of 18111125 is about 262.6123479786.

The spelling of 18111125 in words is "eighteen million, one hundred eleven thousand, one hundred twenty-five".