20528267 has 2 divisors, whose sum is σ = 20528268. Its totient is φ = 20528266.

The previous prime is 20528251. The next prime is 20528281. The reversal of 20528267 is 76282502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20528267 - 2⁴ = 20528251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20528467) 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 as a sum of consecutive naturals, namely, 10264133 + 10264134.

It is an arithmetic number, because the mean of its divisors is an integer number (10264134).

Almost surely, 2^20528267 is an apocalyptic number.

20528267 is a deficient number, since it is larger than the sum of its proper divisors (1).

20528267 is an equidigital number, since it uses as much as digits as its factorization.

20528267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20528267 is about 4530.8130616921. The cubic root of 20528267 is about 273.8109187972.

The spelling of 20528267 in words is "twenty million, five hundred twenty-eight thousand, two hundred sixty-seven".