18618330911 has 2 divisors, whose sum is σ = 18618330912. Its totient is φ = 18618330910.

The previous prime is 18618330883. The next prime is 18618330931. The reversal of 18618330911 is 11903381681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18618330911 - 2¹⁸ = 18618068767 is a prime.

It is a super-2 number, since 2×18618330911² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18618330931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9309165455 + 9309165456.

It is an arithmetic number, because the mean of its divisors is an integer number (9309165456).

Almost surely, 2^18618330911 is an apocalyptic number.

18618330911 is a deficient number, since it is larger than the sum of its proper divisors (1).

18618330911 is an equidigital number, since it uses as much as digits as its factorization.

18618330911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 18618330911 in words is "eighteen billion, six hundred eighteen million, three hundred thirty thousand, nine hundred eleven".