20166185 has 12 divisors (see below), whose sum is σ = 26107788. Its totient is φ = 14865216.

The previous prime is 20166169. The next prime is 20166217. The reversal of 20166185 is 58166102.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 9388096 + 10778089 = 3064^2 + 3283^2 .

It is not a de Polignac number, because 20166185 - 2⁴ = 20166169 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 11 ways as a sum of consecutive naturals, for example, 35927 + ... + 36483.

It is an arithmetic number, because the mean of its divisors is an integer number (2175649).

Almost surely, 2^20166185 is an apocalyptic number.

It is an amenable number.

20166185 is a deficient number, since it is larger than the sum of its proper divisors (5941603).

20166185 is an frugal number, since it uses more digits than its factorization.

20166185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20166185 is about 4490.6775658023. The cubic root of 20166185 is about 272.1915146691.

The spelling of 20166185 in words is "twenty million, one hundred sixty-six thousand, one hundred eighty-five".