20528063 has 4 divisors (see below), whose sum is σ = 20834520. Its totient is φ = 20221608.

The previous prime is 20528051. The next prime is 20528069. The reversal of 20528063 is 36082502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36082502 = 2 ⋅18041251.

It is a cyclic number.

It is not a de Polignac number, because 20528063 - 2¹⁴ = 20511679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20528069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153128 + ... + 153261.

It is an arithmetic number, because the mean of its divisors is an integer number (5208630).

Almost surely, 2^20528063 is an apocalyptic number.

20528063 is a deficient number, since it is larger than the sum of its proper divisors (306457).

20528063 is an equidigital number, since it uses as much as digits as its factorization.

20528063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306456.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20528063 is about 4530.7905491205. The cubic root of 20528063 is about 273.8100117940.

The spelling of 20528063 in words is "twenty million, five hundred twenty-eight thousand, sixty-three".