21303133230 has 64 divisors (see below), whose sum is σ = 52826162688. Its totient is φ = 5495118720.

The previous prime is 21303133223. The next prime is 21303133231. The reversal of 21303133230 is 3233130312.

It is a junction number, because it is equal to n+sod(n) for n = 21303133197 and 21303133206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303133231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18537 + ... + 207243.

It is an arithmetic number, because the mean of its divisors is an integer number (825408792).

Almost surely, 2^21303133230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21303133230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26413081344).

21303133230 is an abundant number, since it is smaller than the sum of its proper divisors (31523029458).

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

21303133230 is a wasteful number, since it uses less digits than its factorization.

21303133230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188841.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21303133230 its reverse (3233130312), we get a palindrome (24536263542).

The spelling of 21303133230 in words is "twenty-one billion, three hundred three million, one hundred thirty-three thousand, two hundred thirty".