20441566 has 16 divisors (see below), whose sum is σ = 31530240. Its totient is φ = 9935640.

The previous prime is 20441563. The next prime is 20441573. The reversal of 20441566 is 66514402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20441563) 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 7 ways as a sum of consecutive naturals, for example, 9621 + ... + 11551.

It is an arithmetic number, because the mean of its divisors is an integer number (1970640).

Almost surely, 2^20441566 is an apocalyptic number.

20441566 is a deficient number, since it is larger than the sum of its proper divisors (11088674).

20441566 is a wasteful number, since it uses less digits than its factorization.

20441566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20441566 is about 4521.2350082693. The cubic root of 20441566 is about 273.4248952949.

Adding to 20441566 its reverse (66514402), we get a palindrome (86955968).

The spelling of 20441566 in words is "twenty million, four hundred forty-one thousand, five hundred sixty-six".