20528235 has 80 divisors (see below), whose sum is σ = 45372096. Its totient is φ = 8646912.

The previous prime is 20528203. The next prime is 20528251. The reversal of 20528235 is 53282502.

It is not a de Polignac number, because 20528235 - 2⁵ = 20528203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20528199 and 20528208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 36577 + ... + 37133.

Almost surely, 2^20528235 is an apocalyptic number.

20528235 is an abundant number, since it is smaller than the sum of its proper divisors (24843861).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20528235 is a wasteful number, since it uses less digits than its factorization.

20528235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20528235 is about 4530.8095303157. The cubic root of 20528235 is about 273.8107765226.

The spelling of 20528235 in words is "twenty million, five hundred twenty-eight thousand, two hundred thirty-five".