20708240640748 has 24 divisors (see below), whose sum is σ = 36688108569840. Its totient is φ = 10226187417600.

The previous prime is 20708240640709. The next prime is 20708240640757. The reversal of 20708240640748 is 84704604280702.

It is a junction number, because it is equal to n+sod(n) for n = 20708240640695 and 20708240640704.

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, 32624053 + ... + 33252748.

It is an arithmetic number, because the mean of its divisors is an integer number (1528671190410).

Almost surely, 2^{20708240640748} is an apocalyptic number.

It is an amenable number.

20708240640748 is a deficient number, since it is larger than the sum of its proper divisors (15979867929092).

20708240640748 is a wasteful number, since it uses less digits than its factorization.

20708240640748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65877777 (or 65877775 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 52.

The spelling of 20708240640748 in words is "twenty trillion, seven hundred eight billion, two hundred forty million, six hundred forty thousand, seven hundred forty-eight".