18784223611 has 2 divisors, whose sum is σ = 18784223612. Its totient is φ = 18784223610.

The previous prime is 18784223597. The next prime is 18784223639. The reversal of 18784223611 is 11632248781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18784223611 - 2¹¹ = 18784221563 is a prime.

It is not a weakly prime, because it can be changed into another prime (18784226611) 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, 9392111805 + 9392111806.

It is an arithmetic number, because the mean of its divisors is an integer number (9392111806).

Almost surely, 2^18784223611 is an apocalyptic number.

18784223611 is a deficient number, since it is larger than the sum of its proper divisors (1).

18784223611 is an equidigital number, since it uses as much as digits as its factorization.

18784223611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The spelling of 18784223611 in words is "eighteen billion, seven hundred eighty-four million, two hundred twenty-three thousand, six hundred eleven".