21552303408 has 20 divisors (see below), whose sum is σ = 55676783928. Its totient is φ = 7184101120.

The previous prime is 21552303407. The next prime is 21552303413. The reversal of 21552303408 is 80430325512.

It is not an unprimeable number, because it can be changed into a prime (21552303407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224503113 + ... + 224503208.

Almost surely, 2^21552303408 is an apocalyptic number.

It is an amenable number.

21552303408 is an abundant number, since it is smaller than the sum of its proper divisors (34124480520).

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

21552303408 is a wasteful number, since it uses less digits than its factorization.

21552303408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449006332 (or 449006326 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 21552303408 in words is "twenty-one billion, five hundred fifty-two million, three hundred three thousand, four hundred eight".