21204203054304 has 24 divisors (see below), whose sum is σ = 55661033017800. Its totient is φ = 7068067684736.

The previous prime is 21204203054299. The next prime is 21204203054329. The reversal of 21204203054304 is 40345030240212.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110438557479 + ... + 110438557670.

It is an arithmetic number, because the mean of its divisors is an integer number (2319209709075).

Almost surely, 2^{21204203054304} is an apocalyptic number.

21204203054304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21204203054304 is an abundant number, since it is smaller than the sum of its proper divisors (34456829963496).

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

21204203054304 is a wasteful number, since it uses less digits than its factorization.

21204203054304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220877115162 (or 220877115154 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 21204203054304 its reverse (40345030240212), we get a palindrome (61549233294516).

The spelling of 21204203054304 in words is "twenty-one trillion, two hundred four billion, two hundred three million, fifty-four thousand, three hundred four".