21333133230 has 96 divisors (see below), whose sum is σ = 54508464000. Its totient is φ = 5342384640.

The previous prime is 21333133193. The next prime is 21333133231. The reversal of 21333133230 is 3233133312.

It is a self number, because there is not a number n which added to its sum of digits gives 21333133230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333133231) 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, 4323865 + ... + 4328795.

It is an arithmetic number, because the mean of its divisors is an integer number (567796500).

Almost surely, 2^21333133230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21333133230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27254232000).

21333133230 is an abundant number, since it is smaller than the sum of its proper divisors (33175330770).

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

21333133230 is a wasteful number, since it uses less digits than its factorization.

21333133230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474 (or 5457 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 21333133230 its reverse (3233133312), we get a palindrome (24566266542).

The spelling of 21333133230 in words is "twenty-one billion, three hundred thirty-three million, one hundred thirty-three thousand, two hundred thirty".