20355562643056 has 80 divisors (see below), whose sum is σ = 39721453200000. Its totient is φ = 10105145535744.

The previous prime is 20355562643029. The next prime is 20355562643099. The reversal of 20355562643056 is 65034626555302.

It is a junction number, because it is equal to n+sod(n) for n = 20355562642994 and 20355562643012.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2714433195 + ... + 2714440693.

It is an arithmetic number, because the mean of its divisors is an integer number (496518165000).

Almost surely, 2^{20355562643056} is an apocalyptic number.

It is an amenable number.

20355562643056 is a deficient number, since it is larger than the sum of its proper divisors (19365890556944).

20355562643056 is a wasteful number, since it uses less digits than its factorization.

20355562643056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9686 (or 9680 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 52.

The spelling of 20355562643056 in words is "twenty trillion, three hundred fifty-five billion, five hundred sixty-two million, six hundred forty-three thousand, fifty-six".