18845168369 has 2 divisors, whose sum is σ = 18845168370. Its totient is φ = 18845168368.

The previous prime is 18845168317. The next prime is 18845168371. The reversal of 18845168369 is 96386154881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14611974400 + 4233193969 = 120880^2 + 65063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18845168369 is a prime.

It is a super-2 number, since 2×18845168369² (a number of 21 digits) contains 22 as substring.

Together with 18845168371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18845168569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9422584184 + 9422584185.

It is an arithmetic number, because the mean of its divisors is an integer number (9422584185).

Almost surely, 2^18845168369 is an apocalyptic number.

It is an amenable number.

18845168369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18845168369 is an equidigital number, since it uses as much as digits as its factorization.

18845168369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 59.

The spelling of 18845168369 in words is "eighteen billion, eight hundred forty-five million, one hundred sixty-eight thousand, three hundred sixty-nine".