18924844811 has 2 divisors, whose sum is σ = 18924844812. Its totient is φ = 18924844810.

The previous prime is 18924844747. The next prime is 18924844847. The reversal of 18924844811 is 11844842981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18924844811 - 2⁶ = 18924844747 is a prime.

It is a super-3 number, since 3×18924844811³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18924844811.

It is not a weakly prime, because it can be changed into another prime (18924844871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9462422405 + 9462422406.

It is an arithmetic number, because the mean of its divisors is an integer number (9462422406).

Almost surely, 2^18924844811 is an apocalyptic number.

18924844811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18924844811 is an equidigital number, since it uses as much as digits as its factorization.

18924844811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 589824, while the sum is 50.

The spelling of 18924844811 in words is "eighteen billion, nine hundred twenty-four million, eight hundred forty-four thousand, eight hundred eleven".