20528412 has 12 divisors (see below), whose sum is σ = 47899656. Its totient is φ = 6842800.

The previous prime is 20528411. The next prime is 20528423. The reversal of 20528412 is 21482502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20528411) 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, 855339 + ... + 855362.

It is an arithmetic number, because the mean of its divisors is an integer number (3991638).

Almost surely, 2^20528412 is an apocalyptic number.

It is an amenable number.

20528412 is an abundant number, since it is smaller than the sum of its proper divisors (27371244).

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

20528412 is a wasteful number, since it uses less digits than its factorization.

20528412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710708 (or 1710706 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20528412 is about 4530.8290632069. The cubic root of 20528412 is about 273.8115634772.

The spelling of 20528412 in words is "twenty million, five hundred twenty-eight thousand, four hundred twelve".