18112775 has 18 divisors (see below), whose sum is σ = 23074416. Its totient is φ = 14104000.

The previous prime is 18112763. The next prime is 18112777. The reversal of 18112775 is 57721181.

It is a de Polignac number, because none of the positive numbers 2^k-18112775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18112777) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41810 + ... + 42240.

It is an arithmetic number, because the mean of its divisors is an integer number (1281912).

Almost surely, 2^18112775 is an apocalyptic number.

18112775 is a deficient number, since it is larger than the sum of its proper divisors (4961641).

18112775 is an equidigital number, since it uses as much as digits as its factorization.

18112775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 477 counting only the distinct ones).

The product of its digits is 3920, while the sum is 32.

The square root of 18112775 is about 4255.9105958655. The cubic root of 18112775 is about 262.6203227679.

The spelling of 18112775 in words is "eighteen million, one hundred twelve thousand, seven hundred seventy-five".