20727757760538 has 16 divisors (see below), whose sum is σ = 42074254559520. Its totient is φ = 6806129413776.

The previous prime is 20727757760509. The next prime is 20727757760587. The reversal of 20727757760538 is 83506775772702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25780792833 + ... + 25780793636.

It is an arithmetic number, because the mean of its divisors is an integer number (2629640909970).

Almost surely, 2^{20727757760538} is an apocalyptic number.

20727757760538 is an abundant number, since it is smaller than the sum of its proper divisors (21346496798982).

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

20727757760538 is a wasteful number, since it uses less digits than its factorization.

20727757760538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51561586541.

The product of its (nonzero) digits is 242020800, while the sum is 66.

The spelling of 20727757760538 in words is "twenty trillion, seven hundred twenty-seven billion, seven hundred fifty-seven million, seven hundred sixty thousand, five hundred thirty-eight".