18135165 has 16 divisors (see below), whose sum is σ = 29132928. Its totient is φ = 9633216.

The previous prime is 18135163. The next prime is 18135167. The reversal of 18135165 is 56153181.

It is an interprime number because it is at equal distance from previous prime (18135163) and next prime (18135167).

It is not a de Polignac number, because 18135165 - 2¹ = 18135163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18135163) by changing a digit.

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, 1647 + ... + 6243.

It is an arithmetic number, because the mean of its divisors is an integer number (1820808).

Almost surely, 2^18135165 is an apocalyptic number.

18135165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18135165 is a deficient number, since it is larger than the sum of its proper divisors (10997763).

18135165 is a wasteful number, since it uses less digits than its factorization.

18135165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4868.

The product of its digits is 3600, while the sum is 30.

The square root of 18135165 is about 4258.5402428532. The cubic root of 18135165 is about 262.7284903976.

The spelling of 18135165 in words is "eighteen million, one hundred thirty-five thousand, one hundred sixty-five".