21356254302200 has 48 divisors (see below), whose sum is σ = 49697744137080. Its totient is φ = 8534853912960.

The previous prime is 21356254302191. The next prime is 21356254302203. The reversal of 21356254302200 is 220345265312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21356254302203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47574842 + ... + 48021641.

Almost surely, 2^{21356254302200} is an apocalyptic number.

21356254302200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21356254302200 is an abundant number, since it is smaller than the sum of its proper divisors (28341489834880).

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

21356254302200 is a wasteful number, since it uses less digits than its factorization.

21356254302200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95597616 (or 95597607 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21356254302200 its reverse (220345265312), we get a palindrome (21576599567512).

The spelling of 21356254302200 in words is "twenty-one trillion, three hundred fifty-six billion, two hundred fifty-four million, three hundred two thousand, two hundred".