21063063632 has 20 divisors (see below), whose sum is σ = 43948892820. Its totient is φ = 9721413888.

The previous prime is 21063063613. The next prime is 21063063641. The reversal of 21063063632 is 23636036012.

It can be written as a sum of positive squares in 2 ways, for example, as 2793756736 + 18269306896 = 52856^2 + 135164^2 .

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 3 ways as a sum of consecutive naturals, for example, 50632157 + ... + 50632572.

It is an arithmetic number, because the mean of its divisors is an integer number (2197444641).

Almost surely, 2^21063063632 is an apocalyptic number.

It is an amenable number.

21063063632 is an abundant number, since it is smaller than the sum of its proper divisors (22885829188).

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

21063063632 is a wasteful number, since it uses less digits than its factorization.

21063063632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101264750 (or 101264744 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 21063063632 its reverse (23636036012), we get a palindrome (44699099644).

The spelling of 21063063632 in words is "twenty-one billion, sixty-three million, sixty-three thousand, six hundred thirty-two".