20766731355752 has 8 divisors (see below), whose sum is σ = 38937621292050. Its totient is φ = 10383365677872.

The previous prime is 20766731355737. The next prime is 20766731355757. The reversal of 20766731355752 is 25755313766702.

It can be written as a sum of positive squares in only one way, i.e., 16099947600676 + 4666783755076 = 4012474^2 + 2160274^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20766731355691 and 20766731355700.

It is not an unprimeable number, because it can be changed into a prime (20766731355757) by changing a digit.

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 as a sum of consecutive naturals, namely, 1297920709727 + ... + 1297920709742.

Almost surely, 2^{20766731355752} is an apocalyptic number.

It is an amenable number.

20766731355752 is a deficient number, since it is larger than the sum of its proper divisors (18170889936298).

20766731355752 is a wasteful number, since it uses less digits than its factorization.

20766731355752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595841419475 (or 2595841419471 counting only the distinct ones).

The product of its (nonzero) digits is 55566000, while the sum is 59.

The spelling of 20766731355752 in words is "twenty trillion, seven hundred sixty-six billion, seven hundred thirty-one million, three hundred fifty-five thousand, seven hundred fifty-two".