20750388644456 has 32 divisors (see below), whose sum is σ = 38916132011400. Its totient is φ = 10372753797120.

The previous prime is 20750388644443. The next prime is 20750388644459. The reversal of 20750388644456 is 65444688305702.

It can be written as a sum of positive squares in 4 ways, for example, as 10402779411556 + 10347609232900 = 3225334^2 + 3216770^2 .

It is not an unprimeable number, because it can be changed into a prime (20750388644459) by changing a digit.

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, 927629240 + ... + 927651608.

Almost surely, 2^{20750388644456} is an apocalyptic number.

It is an amenable number.

20750388644456 is a deficient number, since it is larger than the sum of its proper divisors (18165743366944).

20750388644456 is a wasteful number, since it uses less digits than its factorization.

20750388644456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44469 (or 44465 counting only the distinct ones).

The product of its (nonzero) digits is 154828800, while the sum is 62.

The spelling of 20750388644456 in words is "twenty trillion, seven hundred fifty billion, three hundred eighty-eight million, six hundred forty-four thousand, four hundred fifty-six".