20879713360811 has 2 divisors, whose sum is σ = 20879713360812. Its totient is φ = 20879713360810.

The previous prime is 20879713360783. The next prime is 20879713360859. The reversal of 20879713360811 is 11806331797802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20879713360811 - 2⁶ = 20879713360747 is a prime.

It is not a weakly prime, because it can be changed into another prime (20879713360871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10439856680405 + 10439856680406.

It is an arithmetic number, because the mean of its divisors is an integer number (10439856680406).

Almost surely, 2^{20879713360811} is an apocalyptic number.

20879713360811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20879713360811 is an equidigital number, since it uses as much as digits as its factorization.

20879713360811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 20879713360811 in words is "twenty trillion, eight hundred seventy-nine billion, seven hundred thirteen million, three hundred sixty thousand, eight hundred eleven".