20742160687771 has 8 divisors (see below), whose sum is σ = 21139640807744. Its totient is φ = 20346533622720.

The previous prime is 20742160687747. The next prime is 20742160687819. The reversal of 20742160687771 is 17778606124702.

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

It is not a de Polignac number, because 20742160687771 - 2⁷ = 20742160687643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20742160687711) 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, 463241130 + ... + 463285903.

It is an arithmetic number, because the mean of its divisors is an integer number (2642455100968).

Almost surely, 2^{20742160687771} is an apocalyptic number.

20742160687771 is a deficient number, since it is larger than the sum of its proper divisors (397480119973).

20742160687771 is an equidigital number, since it uses as much as digits as its factorization.

20742160687771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926527461.

The product of its (nonzero) digits is 11063808, while the sum is 58.

The spelling of 20742160687771 in words is "twenty trillion, seven hundred forty-two billion, one hundred sixty million, six hundred eighty-seven thousand, seven hundred seventy-one".