18441768511 has 2 divisors, whose sum is σ = 18441768512. Its totient is φ = 18441768510.

The previous prime is 18441768497. The next prime is 18441768551. The reversal of 18441768511 is 11586714481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18441768511 - 2¹¹ = 18441766463 is a prime.

It is a super-2 number, since 2×18441768511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18441768551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9220884255 + 9220884256.

It is an arithmetic number, because the mean of its divisors is an integer number (9220884256).

Almost surely, 2^18441768511 is an apocalyptic number.

18441768511 is a deficient number, since it is larger than the sum of its proper divisors (1).

18441768511 is an equidigital number, since it uses as much as digits as its factorization.

18441768511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 46.

The spelling of 18441768511 in words is "eighteen billion, four hundred forty-one million, seven hundred sixty-eight thousand, five hundred eleven".