18182165 has 8 divisors (see below), whose sum is σ = 22044120. Its totient is φ = 14395392.

The previous prime is 18182149. The next prime is 18182201. The reversal of 18182165 is 56128181.

It can be written as a sum of positive squares in 4 ways, for example, as 5121169 + 13060996 = 2263^2 + 3614^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18182165 - 2⁴ = 18182149 is a prime.

It is a super-2 number, since 2×18182165² = 661182248174450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18260 + ... + 19229.

It is an arithmetic number, because the mean of its divisors is an integer number (2755515).

Almost surely, 2^18182165 is an apocalyptic number.

It is an amenable number.

18182165 is a deficient number, since it is larger than the sum of its proper divisors (3861955).

18182165 is an equidigital number, since it uses as much as digits as its factorization.

18182165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37591.

The product of its digits is 3840, while the sum is 32.

The square root of 18182165 is about 4264.0549949549. The cubic root of 18182165 is about 262.9552613689.

The spelling of 18182165 in words is "eighteen million, one hundred eighty-two thousand, one hundred sixty-five".