18528165 has 12 divisors (see below), whose sum is σ = 32115564. Its totient is φ = 9881664.

The previous prime is 18528163. The next prime is 18528197. The reversal of 18528165 is 56182581.

It can be written as a sum of positive squares in 2 ways, for example, as 9474084 + 9054081 = 3078^2 + 3009^2 .

It is not a de Polignac number, because 18528165 - 2¹ = 18528163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18528163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205824 + ... + 205913.

It is an arithmetic number, because the mean of its divisors is an integer number (2676297).

Almost surely, 2^18528165 is an apocalyptic number.

18528165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18528165 is a deficient number, since it is larger than the sum of its proper divisors (13587399).

18528165 is a wasteful number, since it uses less digits than its factorization.

18528165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411748 (or 411745 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 18528165 is about 4304.4355030596. The cubic root of 18528165 is about 264.6127725250.

The spelling of 18528165 in words is "eighteen million, five hundred twenty-eight thousand, one hundred sixty-five".