20087265 has 32 divisors (see below), whose sum is σ = 35738496. Its totient is φ = 9551360.

The previous prime is 20087231. The next prime is 20087269. The reversal of 20087265 is 56278002.

It is not a de Polignac number, because 20087265 - 2¹² = 20083169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20087269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7597 + ... + 9893.

It is an arithmetic number, because the mean of its divisors is an integer number (1116828).

Almost surely, 2^20087265 is an apocalyptic number.

It is an amenable number.

20087265 is a deficient number, since it is larger than the sum of its proper divisors (15651231).

20087265 is a wasteful number, since it uses less digits than its factorization.

20087265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20087265 is about 4481.8818592194. The cubic root of 20087265 is about 271.8359782812.

The spelling of 20087265 in words is "twenty million, eighty-seven thousand, two hundred sixty-five".