21032303320 has 96 divisors (see below), whose sum is σ = 55224121680. Its totient is φ = 7188115200.

The previous prime is 21032303311. The next prime is 21032303323. The reversal of 21032303320 is 2330323012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032303323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604395 + ... + 638245.

Almost surely, 2^21032303320 is an apocalyptic number.

21032303320 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 21032303320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27612060840).

21032303320 is an abundant number, since it is smaller than the sum of its proper divisors (34191818360).

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

21032303320 is a wasteful number, since it uses less digits than its factorization.

21032303320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34193 (or 34182 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21032303320 its reverse (2330323012), we get a palindrome (23362626332).

The spelling of 21032303320 in words is "twenty-one billion, thirty-two million, three hundred three thousand, three hundred twenty".