20286165 has 16 divisors (see below), whose sum is σ = 32660928. Its totient is φ = 10751616.

The previous prime is 20286157. The next prime is 20286169. The reversal of 20286165 is 56168202.

It is not a de Polignac number, because 20286165 - 2³ = 20286157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20286169) 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, 1704 + ... + 6593.

It is an arithmetic number, because the mean of its divisors is an integer number (2041308).

Almost surely, 2^20286165 is an apocalyptic number.

It is an amenable number.

20286165 is a deficient number, since it is larger than the sum of its proper divisors (12374763).

20286165 is a wasteful number, since it uses less digits than its factorization.

20286165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20286165 is about 4504.0165408222. The cubic root of 20286165 is about 272.7302545634.

The spelling of 20286165 in words is "twenty million, two hundred eighty-six thousand, one hundred sixty-five".