21552501200304 has 20 divisors (see below), whose sum is σ = 55677294767576. Its totient is φ = 7184167066752.

The previous prime is 21552501200287. The next prime is 21552501200311. The reversal of 21552501200304 is 40300210525512.

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, 224505220789 + ... + 224505220884.

Almost surely, 2^{21552501200304} is an apocalyptic number.

21552501200304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21552501200304 is an abundant number, since it is smaller than the sum of its proper divisors (34124793567272).

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

21552501200304 is a wasteful number, since it uses less digits than its factorization.

21552501200304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449010441684 (or 449010441678 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 21552501200304 its reverse (40300210525512), we get a palindrome (61852711725816).

The spelling of 21552501200304 in words is "twenty-one trillion, five hundred fifty-two billion, five hundred one million, two hundred thousand, three hundred four".