20005203504 has 80 divisors (see below), whose sum is σ = 60715113984. Its totient is φ = 5595859200.

The previous prime is 20005203499. The next prime is 20005203521. The reversal of 20005203504 is 40530250002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1450392 + ... + 1464119.

Almost surely, 2^20005203504 is an apocalyptic number.

20005203504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20005203504 is an abundant number, since it is smaller than the sum of its proper divisors (40709910480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20005203504 is a wasteful number, since it uses less digits than its factorization.

20005203504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914546 (or 2914540 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

Adding to 20005203504 its reverse (40530250002), we get a palindrome (60535453506).

The spelling of 20005203504 in words is "twenty billion, five million, two hundred three thousand, five hundred four".