18322243641487 has 2 divisors, whose sum is σ = 18322243641488. Its totient is φ = 18322243641486.

The previous prime is 18322243641467. The next prime is 18322243641613. The reversal of 18322243641487 is 78414634222381.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18322243641487 is a prime.

It is a super-3 number, since 3×18322243641487³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18322243641437) 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, 9161121820743 + 9161121820744.

It is an arithmetic number, because the mean of its divisors is an integer number (9161121820744).

Almost surely, 2^{18322243641487} is an apocalyptic number.

18322243641487 is a deficient number, since it is larger than the sum of its proper divisors (1).

18322243641487 is an equidigital number, since it uses as much as digits as its factorization.

18322243641487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12386304, while the sum is 55.

The spelling of 18322243641487 in words is "eighteen trillion, three hundred twenty-two billion, two hundred forty-three million, six hundred forty-one thousand, four hundred eighty-seven".