20727757760657 has 8 divisors (see below), whose sum is σ = 22037058293184. Its totient is φ = 19452465034288.

The previous prime is 20727757760651. The next prime is 20727757760669. The reversal of 20727757760657 is 75606775772702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20727757760657 - 2⁸ = 20727757760401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20727757760651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8501950283 + ... + 8501952720.

It is an arithmetic number, because the mean of its divisors is an integer number (2754632286648).

Almost surely, 2^{20727757760657} is an apocalyptic number.

It is an amenable number.

20727757760657 is a deficient number, since it is larger than the sum of its proper divisors (1309300532527).

20727757760657 is a wasteful number, since it uses less digits than its factorization.

20727757760657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17003903079.

The product of its (nonzero) digits is 423536400, while the sum is 68.

The spelling of 20727757760657 in words is "twenty trillion, seven hundred twenty-seven billion, seven hundred fifty-seven million, seven hundred sixty thousand, six hundred fifty-seven".