20704608274979 has 2 divisors, whose sum is σ = 20704608274980. Its totient is φ = 20704608274978.

The previous prime is 20704608274967. The next prime is 20704608275011. The reversal of 20704608274979 is 97947280640702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20704608274979 - 2⁸ = 20704608274723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20704608274939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10352304137489 + 10352304137490.

It is an arithmetic number, because the mean of its divisors is an integer number (10352304137490).

Almost surely, 2^{20704608274979} is an apocalyptic number.

20704608274979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20704608274979 is an equidigital number, since it uses as much as digits as its factorization.

20704608274979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85349376, while the sum is 65.

The spelling of 20704608274979 in words is "twenty trillion, seven hundred four billion, six hundred eight million, two hundred seventy-four thousand, nine hundred seventy-nine".