21330202320 has 120 divisors (see below), whose sum is σ = 81867367296. Its totient is φ = 4875473664.

The previous prime is 21330202297. The next prime is 21330202339. The reversal of 21330202320 is 2320203312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21330202293 and 21330202302.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 2111052 + ... + 2121131.

Almost surely, 2^21330202320 is an apocalyptic number.

21330202320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21330202320 is an abundant number, since it is smaller than the sum of its proper divisors (60537164976).

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

21330202320 is a wasteful number, since it uses less digits than its factorization.

21330202320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4232209 (or 4232200 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21330202320 its reverse (2320203312), we get a palindrome (23650405632).

The spelling of 21330202320 in words is "twenty-one billion, three hundred thirty million, two hundred two thousand, three hundred twenty".