21200324200 has 192 divisors, whose sum is σ = 55090134720. Its totient is φ = 7522560000.

The previous prime is 21200324153. The next prime is 21200324207. The reversal of 21200324200 is 242300212.

It is not an unprimeable number, because it can be changed into a prime (21200324207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16219947 + ... + 16221253.

It is an arithmetic number, because the mean of its divisors is an integer number (286927785).

Almost surely, 2^21200324200 is an apocalyptic number.

21200324200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21200324200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27545067360).

21200324200 is an abundant number, since it is smaller than the sum of its proper divisors (33889810520).

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

21200324200 is a wasteful number, since it uses less digits than its factorization.

21200324200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21200324200 its reverse (242300212), we get a palindrome (21442624412).

The spelling of 21200324200 in words is "twenty-one billion, two hundred million, three hundred twenty-four thousand, two hundred".