18336867235541 has 2 divisors, whose sum is σ = 18336867235542. Its totient is φ = 18336867235540.

The previous prime is 18336867235537. The next prime is 18336867235543. The reversal of 18336867235541 is 14553276863381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14737229988100 + 3599637247441 = 3838910^2 + 1897271^2 .

It is a cyclic number.

It is not a de Polignac number, because 18336867235541 - 2² = 18336867235537 is a prime.

It is a super-3 number, since 3×18336867235541³ (a number of 41 digits) contains 333 as substring.

Together with 18336867235543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18336867235543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9168433617770 + 9168433617771.

It is an arithmetic number, because the mean of its divisors is an integer number (9168433617771).

Almost surely, 2^{18336867235541} is an apocalyptic number.

It is an amenable number.

18336867235541 is a deficient number, since it is larger than the sum of its proper divisors (1).

18336867235541 is an equidigital number, since it uses as much as digits as its factorization.

18336867235541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87091200, while the sum is 62.

The spelling of 18336867235541 in words is "eighteen trillion, three hundred thirty-six billion, eight hundred sixty-seven million, two hundred thirty-five thousand, five hundred forty-one".