21244203300 has 144 divisors (see below), whose sum is σ = 63324072000. Its totient is φ = 5495500800.

The previous prime is 21244203283. The next prime is 21244203313. The reversal of 21244203300 is 330244212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2196876 + ... + 2206524.

It is an arithmetic number, because the mean of its divisors is an integer number (439750500).

Almost surely, 2^21244203300 is an apocalyptic number.

21244203300 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 21244203300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31662036000).

21244203300 is an abundant number, since it is smaller than the sum of its proper divisors (42079868700).

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

21244203300 is a wasteful number, since it uses less digits than its factorization.

21244203300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9886 (or 9879 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21244203300 its reverse (330244212), we get a palindrome (21574447512).

The spelling of 21244203300 in words is "twenty-one billion, two hundred forty-four million, two hundred three thousand, three hundred".