20366775656 has 16 divisors (see below), whose sum is σ = 38381553540. Its totient is φ = 10131694720.

The previous prime is 20366775643. The next prime is 20366775703. The reversal of 20366775656 is 65657766302.

It can be written as a sum of positive squares in 2 ways, for example, as 14969522500 + 5397253156 = 122350^2 + 73466^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20366775598 and 20366775607.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 6459965 + ... + 6463116.

Almost surely, 2^20366775656 is an apocalyptic number.

It is an amenable number.

20366775656 is a deficient number, since it is larger than the sum of its proper divisors (18014777884).

20366775656 is a wasteful number, since it uses less digits than its factorization.

20366775656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12923284 (or 12923280 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 53.

The spelling of 20366775656 in words is "twenty billion, three hundred sixty-six million, seven hundred seventy-five thousand, six hundred fifty-six".