20466663557056 has 14 divisors (see below), whose sum is σ = 40613535496160. Its totient is φ = 10233331778496.

The previous prime is 20466663557047. The next prime is 20466663557077. The reversal of 20466663557056 is 65075536666402.

It is a junction number, because it is equal to n+sod(n) for n = 20466663556985 and 20466663557003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159895808976 + ... + 159895809103.

Almost surely, 2^{20466663557056} is an apocalyptic number.

It is an amenable number.

20466663557056 is a deficient number, since it is larger than the sum of its proper divisors (20146871939104).

20466663557056 is an equidigital number, since it uses as much as digits as its factorization.

20466663557056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319791618091 (or 319791618081 counting only the distinct ones).

The product of its (nonzero) digits is 163296000, while the sum is 61.

The spelling of 20466663557056 in words is "twenty trillion, four hundred sixty-six billion, six hundred sixty-three million, five hundred fifty-seven thousand, fifty-six".