21745753755268 has 24 divisors (see below), whose sum is σ = 40779067648032. Its totient is φ = 10110003160704.

The previous prime is 21745753755233. The next prime is 21745753755289. The reversal of 21745753755268 is 86255735754712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1926443130 + ... + 1926454417.

It is an arithmetic number, because the mean of its divisors is an integer number (1699127818668).

Almost surely, 2^{21745753755268} is an apocalyptic number.

It is an amenable number.

21745753755268 is a deficient number, since it is larger than the sum of its proper divisors (19033313892764).

21745753755268 is a wasteful number, since it uses less digits than its factorization.

21745753755268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3852897651 (or 3852897649 counting only the distinct ones).

The product of its digits is 493920000, while the sum is 67.

The spelling of 21745753755268 in words is "twenty-one trillion, seven hundred forty-five billion, seven hundred fifty-three million, seven hundred fifty-five thousand, two hundred sixty-eight".