20702075664656 has 20 divisors (see below), whose sum is σ = 40790106714000. Its totient is φ = 10175596512672.

The previous prime is 20702075664653. The next prime is 20702075664691. The reversal of 20702075664656 is 65646657020702.

It is not an unprimeable number, because it can be changed into a prime (20702075664653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10965081506 + ... + 10965083393.

It is an arithmetic number, because the mean of its divisors is an integer number (2039505335700).

Almost surely, 2^{20702075664656} is an apocalyptic number.

It is an amenable number.

20702075664656 is a deficient number, since it is larger than the sum of its proper divisors (20088031049344).

20702075664656 is a wasteful number, since it uses less digits than its factorization.

20702075664656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21930164966 (or 21930164960 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 56.

The spelling of 20702075664656 in words is "twenty trillion, seven hundred two billion, seventy-five million, six hundred sixty-four thousand, six hundred fifty-six".