20105404504 has 32 divisors (see below), whose sum is σ = 37859779440. Its totient is φ = 10009526400.

The previous prime is 20105404499. The next prime is 20105404537. The reversal of 20105404504 is 40540450102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3233959 + ... + 3240169.

Almost surely, 2^20105404504 is an apocalyptic number.

It is an amenable number.

20105404504 is a deficient number, since it is larger than the sum of its proper divisors (17754374936).

20105404504 is a wasteful number, since it uses less digits than its factorization.

20105404504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7891 (or 7887 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 20105404504 its reverse (40540450102), we get a palindrome (60645854606).

The spelling of 20105404504 in words is "twenty billion, one hundred five million, four hundred four thousand, five hundred four".