21104243023200 has 144 divisors (see below), whose sum is σ = 72309801251520. Its totient is φ = 5331598225920.

The previous prime is 21104243023187. The next prime is 21104243023273. The reversal of 21104243023200 is 232034240112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231360574 + ... + 231451773.

It is an arithmetic number, because the mean of its divisors is an integer number (502151397580).

Almost surely, 2^{21104243023200} is an apocalyptic number.

21104243023200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21104243023200 is an abundant number, since it is smaller than the sum of its proper divisors (51205558228320).

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

21104243023200 is a wasteful number, since it uses less digits than its factorization.

21104243023200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462812389 (or 462812376 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21104243023200 its reverse (232034240112), we get a palindrome (21336277263312).

The spelling of 21104243023200 in words is "twenty-one trillion, one hundred four billion, two hundred forty-three million, twenty-three thousand, two hundred".