21332332220 has 24 divisors (see below), whose sum is σ = 44802072000. Its totient is φ = 8532137792.

The previous prime is 21332332199. The next prime is 21332332243. The reversal of 21332332220 is 2223323312.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 201206 + ... + 288354.

It is an arithmetic number, because the mean of its divisors is an integer number (1866753000).

Almost surely, 2^21332332220 is an apocalyptic number.

21332332220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21332332220 is an abundant number, since it is smaller than the sum of its proper divisors (23469739780).

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

21332332220 is a wasteful number, since it uses less digits than its factorization.

21332332220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99397 (or 99395 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21332332220 its reverse (2223323312), we get a palindrome (23555655532).

The spelling of 21332332220 in words is "twenty-one billion, three hundred thirty-two million, three hundred thirty-two thousand, two hundred twenty".