20450564 has 12 divisors (see below), whose sum is σ = 35831964. Its totient is φ = 10212864.

The previous prime is 20450543. The next prime is 20450567. The reversal of 20450564 is 46505402.

It can be written as a sum of positive squares in 2 ways, for example, as 19430464 + 1020100 = 4408^2 + 1010^2 .

It is not an unprimeable number, because it can be changed into a prime (20450567) 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, 1292 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (2985997).

Almost surely, 2^20450564 is an apocalyptic number.

It is an amenable number.

20450564 is a deficient number, since it is larger than the sum of its proper divisors (15381400).

20450564 is a wasteful number, since it uses less digits than its factorization.

20450564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214 (or 6212 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 20450564 is about 4522.2299808833. The cubic root of 20450564 is about 273.4650082736.

Adding to 20450564 its reverse (46505402), we get a palindrome (66955966).

The spelling of 20450564 in words is "twenty million, four hundred fifty thousand, five hundred sixty-four".