21333140224 has 144 divisors (see below), whose sum is σ = 47283165216. Its totient is φ = 9605038080.

The previous prime is 21333140219. The next prime is 21333140261. The reversal of 21333140224 is 42204133312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46680604 + ... + 46681060.

It is an arithmetic number, because the mean of its divisors is an integer number (328355314).

Almost surely, 2^21333140224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21333140224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23641582608).

21333140224 is an abundant number, since it is smaller than the sum of its proper divisors (25950024992).

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

21333140224 is an equidigital number, since it uses as much as digits as its factorization.

21333140224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21333140224 its reverse (42204133312), we get a palindrome (63537273536).

The spelling of 21333140224 in words is "twenty-one billion, three hundred thirty-three million, one hundred forty thousand, two hundred twenty-four".