20804161711 has 2 divisors, whose sum is σ = 20804161712. Its totient is φ = 20804161710.

The previous prime is 20804161673. The next prime is 20804161747. The reversal of 20804161711 is 11716140802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20804161711 - 2⁷ = 20804161583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20804161771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10402080855 + 10402080856.

It is an arithmetic number, because the mean of its divisors is an integer number (10402080856).

Almost surely, 2^20804161711 is an apocalyptic number.

20804161711 is a deficient number, since it is larger than the sum of its proper divisors (1).

20804161711 is an equidigital number, since it uses as much as digits as its factorization.

20804161711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The spelling of 20804161711 in words is "twenty billion, eight hundred four million, one hundred sixty-one thousand, seven hundred eleven".