21330322220 has 48 divisors (see below), whose sum is σ = 45027003168. Its totient is φ = 8487790080.

The previous prime is 21330322163. The next prime is 21330322249. The reversal of 21330322220 is 2222303312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21330322192 and 21330322201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3835682 + ... + 3841238.

It is an arithmetic number, because the mean of its divisors is an integer number (938062566).

Almost surely, 2^21330322220 is an apocalyptic number.

21330322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21330322220 is an abundant number, since it is smaller than the sum of its proper divisors (23696680948).

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

21330322220 is a wasteful number, since it uses less digits than its factorization.

21330322220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530 (or 6528 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21330322220 its reverse (2222303312), we get a palindrome (23552625532).

The spelling of 21330322220 in words is "twenty-one billion, three hundred thirty million, three hundred twenty-two thousand, two hundred twenty".