20205573 has 16 divisors (see below), whose sum is σ = 27396096. Its totient is φ = 13245120.

The previous prime is 20205557. The next prime is 20205587. The reversal of 20205573 is 37550202.

It is not a de Polignac number, because 20205573 - 2⁴ = 20205557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68815 + ... + 69107.

It is an arithmetic number, because the mean of its divisors is an integer number (1712256).

Almost surely, 2^20205573 is an apocalyptic number.

It is an amenable number.

20205573 is a deficient number, since it is larger than the sum of its proper divisors (7190523).

20205573 is a wasteful number, since it uses less digits than its factorization.

20205573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20205573 is about 4495.0609562052. The cubic root of 20205573 is about 272.3686115752.

Adding to 20205573 its reverse (37550202), we get a palindrome (57755775).

The spelling of 20205573 in words is "twenty million, two hundred five thousand, five hundred seventy-three".