20845528 has 16 divisors (see below), whose sum is σ = 42638760. Its totient is φ = 9475200.

The previous prime is 20845523. The next prime is 20845537. The reversal of 20845528 is 82554802.

It is a junction number, because it is equal to n+sod(n) for n = 20845493 and 20845502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20845523) 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 3 ways as a sum of consecutive naturals, for example, 118353 + ... + 118528.

Almost surely, 2^20845528 is an apocalyptic number.

It is an amenable number.

20845528 is an abundant number, since it is smaller than the sum of its proper divisors (21793232).

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

20845528 is a wasteful number, since it uses less digits than its factorization.

20845528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236898 (or 236894 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 20845528 is about 4565.6903092523. The cubic root of 20845528 is about 275.2142814722.

It can be divided in two parts, 20 and 845528, that added together give a palindrome (845548).

The spelling of 20845528 in words is "twenty million, eight hundred forty-five thousand, five hundred twenty-eight".