18190165 has 16 divisors (see below), whose sum is σ = 25322112. Its totient is φ = 12285504.

The previous prime is 18190127. The next prime is 18190223. The reversal of 18190165 is 56109181.

It is not a de Polignac number, because 18190165 - 2⁷ = 18190037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1534 + ... + 6223.

It is an arithmetic number, because the mean of its divisors is an integer number (1582632).

Almost surely, 2^18190165 is an apocalyptic number.

It is an amenable number.

18190165 is a deficient number, since it is larger than the sum of its proper divisors (7131947).

18190165 is an equidigital number, since it uses as much as digits as its factorization.

18190165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7836.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 18190165 is about 4264.9929659965. The cubic root of 18190165 is about 262.9938217500.

The spelling of 18190165 in words is "eighteen million, one hundred ninety thousand, one hundred sixty-five".