20683656683664 has 80 divisors (see below), whose sum is σ = 59527234804800. Its totient is φ = 6144746807808.

The previous prime is 20683656683663. The next prime is 20683656683731. The reversal of 20683656683664 is 46638665638602.

It is not an unprimeable number, because it can be changed into a prime (20683656683663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571479934 + ... + 571516125.

It is an arithmetic number, because the mean of its divisors is an integer number (744090435060).

Almost surely, 2^{20683656683664} is an apocalyptic number.

20683656683664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20683656683664 is an abundant number, since it is smaller than the sum of its proper divisors (38843578121136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20683656683664 is a wasteful number, since it uses less digits than its factorization.

20683656683664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142996112 (or 1142996106 counting only the distinct ones).

The product of its (nonzero) digits is 1074954240, while the sum is 69.

The spelling of 20683656683664 in words is "twenty trillion, six hundred eighty-three billion, six hundred fifty-six million, six hundred eighty-three thousand, six hundred sixty-four".