20528567 has 2 divisors, whose sum is σ = 20528568. Its totient is φ = 20528566.

The previous prime is 20528551. The next prime is 20528591. The reversal of 20528567 is 76582502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20528567 - 2⁴ = 20528551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20528507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10264283 + 10264284.

It is an arithmetic number, because the mean of its divisors is an integer number (10264284).

Almost surely, 2^20528567 is an apocalyptic number.

20528567 is a deficient number, since it is larger than the sum of its proper divisors (1).

20528567 is an equidigital number, since it uses as much as digits as its factorization.

20528567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 20528567 is about 4530.8461682118. The cubic root of 20528567 is about 273.8122526146.

The spelling of 20528567 in words is "twenty million, five hundred twenty-eight thousand, five hundred sixty-seven".