20004304400020 has 48 divisors (see below), whose sum is σ = 42722511693120. Its totient is φ = 7865831483136.

The previous prime is 20004304399999. The next prime is 20004304400051. The reversal of 20004304400020 is 2000440340002.

It is a congruent number.

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, 36345799 + ... + 36892081.

It is an arithmetic number, because the mean of its divisors is an integer number (890052326940).

Almost surely, 2^{20004304400020} is an apocalyptic number.

20004304400020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004304400020 is an abundant number, since it is smaller than the sum of its proper divisors (22718207293100).

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

20004304400020 is a wasteful number, since it uses less digits than its factorization.

20004304400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577384 (or 577382 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20004304400020 its reverse (2000440340002), we get a palindrome (22004744740022).

The spelling of 20004304400020 in words is "twenty trillion, four billion, three hundred four million, four hundred thousand, twenty".