20441636 has 12 divisors (see below), whose sum is σ = 37006620. Its totient is φ = 9868320.

The previous prime is 20441627. The next prime is 20441639. The reversal of 20441636 is 63614402.

It can be written as a sum of positive squares in 2 ways, for example, as 10240000 + 10201636 = 3200^2 + 3194^2 .

It is not an unprimeable number, because it can be changed into a prime (20441639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87995 + ... + 88226.

It is an arithmetic number, because the mean of its divisors is an integer number (3083885).

Almost surely, 2^20441636 is an apocalyptic number.

It is an amenable number.

20441636 is a deficient number, since it is larger than the sum of its proper divisors (16564984).

20441636 is a wasteful number, since it uses less digits than its factorization.

20441636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176254 (or 176252 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20441636 is about 4521.2427495104. The cubic root of 20441636 is about 273.4252073995.

The spelling of 20441636 in words is "twenty million, four hundred forty-one thousand, six hundred thirty-six".