18052112213381 has 2 divisors, whose sum is σ = 18052112213382. Its totient is φ = 18052112213380.

The previous prime is 18052112213353. The next prime is 18052112213453. The reversal of 18052112213381 is 18331221125081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18040755048481 + 11357164900 = 4247441^2 + 106570^2 .

It is an emirp because it is prime and its reverse (18331221125081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18052112213381 is a prime.

It is a super-2 number, since 2×18052112213381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18052112213341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9026056106690 + 9026056106691.

It is an arithmetic number, because the mean of its divisors is an integer number (9026056106691).

Almost surely, 2^{18052112213381} is an apocalyptic number.

It is an amenable number.

18052112213381 is a deficient number, since it is larger than the sum of its proper divisors (1).

18052112213381 is an equidigital number, since it uses as much as digits as its factorization.

18052112213381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 38.

The spelling of 18052112213381 in words is "eighteen trillion, fifty-two billion, one hundred twelve million, two hundred thirteen thousand, three hundred eighty-one".