20528265 has 48 divisors (see below), whose sum is σ = 36868608. Its totient is φ = 9718272.

The previous prime is 20528251. The next prime is 20528267. The reversal of 20528265 is 56282502.

It is not a de Polignac number, because 20528265 - 2¹¹ = 20526217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20528267) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91944 + ... + 92166.

It is an arithmetic number, because the mean of its divisors is an integer number (768096).

Almost surely, 2^20528265 is an apocalyptic number.

It is an amenable number.

20528265 is a deficient number, since it is larger than the sum of its proper divisors (16340343).

20528265 is a wasteful number, since it uses less digits than its factorization.

20528265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 20528265 is about 4530.8128409812. The cubic root of 20528265 is about 273.8109099051.

The spelling of 20528265 in words is "twenty million, five hundred twenty-eight thousand, two hundred sixty-five".