20528441 has 4 divisors (see below), whose sum is σ = 20538000. Its totient is φ = 20518884.

The previous prime is 20528429. The next prime is 20528447. The reversal of 20528441 is 14482502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20528441 - 2¹⁰ = 20527417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20528441.

It is not an unprimeable number, because it can be changed into a prime (20528447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110 + ... + 6408.

It is an arithmetic number, because the mean of its divisors is an integer number (5134500).

Almost surely, 2^20528441 is an apocalyptic number.

It is an amenable number.

20528441 is a deficient number, since it is larger than the sum of its proper divisors (9559).

20528441 is an equidigital number, since it uses as much as digits as its factorization.

20528441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9558.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 20528441 is about 4530.8322635030. The cubic root of 20528441 is about 273.8116924129.

The spelling of 20528441 in words is "twenty million, five hundred twenty-eight thousand, four hundred forty-one".