21330431303232 has 112 divisors (see below), whose sum is σ = 56907639816192. Its totient is φ = 7050897584640.

The previous prime is 21330431303213. The next prime is 21330431303243. The reversal of 21330431303232 is 23230313403312.

It is a self number, because there is not a number n which added to its sum of digits gives 21330431303232.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35493313 + ... + 36089279.

Almost surely, 2^{21330431303232} 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 21330431303232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28453819908096).

21330431303232 is an abundant number, since it is smaller than the sum of its proper divisors (35577208512960).

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

21330431303232 is a wasteful number, since it uses less digits than its factorization.

21330431303232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597536 (or 597526 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 30.

Adding to 21330431303232 its reverse (23230313403312), we get a palindrome (44560744706544).

The spelling of 21330431303232 in words is "twenty-one trillion, three hundred thirty billion, four hundred thirty-one million, three hundred three thousand, two hundred thirty-two".