19818614111 has 2 divisors, whose sum is σ = 19818614112. Its totient is φ = 19818614110.

The previous prime is 19818614051. The next prime is 19818614131. The reversal of 19818614111 is 11141681891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19818614111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19818614131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9909307055 + 9909307056.

It is an arithmetic number, because the mean of its divisors is an integer number (9909307056).

Almost surely, 2^19818614111 is an apocalyptic number.

19818614111 is a deficient number, since it is larger than the sum of its proper divisors (1).

19818614111 is an equidigital number, since it uses as much as digits as its factorization.

19818614111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 41.

The spelling of 19818614111 in words is "nineteen billion, eight hundred eighteen million, six hundred fourteen thousand, one hundred eleven".