20104436 has 24 divisors (see below), whose sum is σ = 38513664. Its totient is φ = 9106880.

The previous prime is 20104433. The next prime is 20104493. The reversal of 20104436 is 63440102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16256 + ... + 17448.

It is an arithmetic number, because the mean of its divisors is an integer number (1604736).

Almost surely, 2^20104436 is an apocalyptic number.

It is an amenable number.

20104436 is a deficient number, since it is larger than the sum of its proper divisors (18409228).

20104436 is a wasteful number, since it uses less digits than its factorization.

20104436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20104436 is about 4483.7970516070. The cubic root of 20104436 is about 271.9134131834.

Adding to 20104436 its reverse (63440102), we get a palindrome (83544538).

It can be divided in two parts, 2010 and 4436, that added together give a palindrome (6446).

The spelling of 20104436 in words is "twenty million, one hundred four thousand, four hundred thirty-six".