18601149911 has 2 divisors, whose sum is σ = 18601149912. Its totient is φ = 18601149910.

The previous prime is 18601149887. The next prime is 18601149923. The reversal of 18601149911 is 11994110681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18601149911 is a prime.

It is a super-2 number, since 2×18601149911² (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 (18601149211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9300574955 + 9300574956.

It is an arithmetic number, because the mean of its divisors is an integer number (9300574956).

Almost surely, 2^18601149911 is an apocalyptic number.

18601149911 is a deficient number, since it is larger than the sum of its proper divisors (1).

18601149911 is an equidigital number, since it uses as much as digits as its factorization.

18601149911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 41.

The spelling of 18601149911 in words is "eighteen billion, six hundred one million, one hundred forty-nine thousand, nine hundred eleven".