21303361056 has 48 divisors (see below), whose sum is σ = 55982404800. Its totient is φ = 7093363968.

The previous prime is 21303361019. The next prime is 21303361061. The reversal of 21303361056 is 65016330312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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, 32511 + ... + 208958.

It is an arithmetic number, because the mean of its divisors is an integer number (1166300100).

Almost surely, 2^21303361056 is an apocalyptic number.

It is an amenable number.

21303361056 is an abundant number, since it is smaller than the sum of its proper divisors (34679043744).

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

21303361056 is a wasteful number, since it uses less digits than its factorization.

21303361056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242401 (or 242393 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 21303361056 its reverse (65016330312), we get a palindrome (86319691368).

The spelling of 21303361056 in words is "twenty-one billion, three hundred three million, three hundred sixty-one thousand, fifty-six".