20265165 has 48 divisors (see below), whose sum is σ = 36940800. Its totient is φ = 10264320.

The previous prime is 20265151. The next prime is 20265181. The reversal of 20265165 is 56156202.

20265165 is a `hidden beast` number, since 2 + 0 + 2 + 651 + 6 + 5 = 666.

It is not a de Polignac number, because 20265165 - 2¹⁰ = 20264141 is a prime.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 101736 + ... + 101934.

It is an arithmetic number, because the mean of its divisors is an integer number (769600).

Almost surely, 2^20265165 is an apocalyptic number.

It is an amenable number.

20265165 is a deficient number, since it is larger than the sum of its proper divisors (16675635).

20265165 is a wasteful number, since it uses less digits than its factorization.

20265165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20265165 is about 4501.6846846486. The cubic root of 20265165 is about 272.6361130179.

The spelling of 20265165 in words is "twenty million, two hundred sixty-five thousand, one hundred sixty-five".