18388383373 has 2 divisors, whose sum is σ = 18388383374. Its totient is φ = 18388383372.

The previous prime is 18388383371. The next prime is 18388383451. The reversal of 18388383373 is 37338388381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18388173609 + 209764 = 135603^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 18388383373 - 2¹ = 18388383371 is a prime.

Together with 18388383371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18388383371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9194191686 + 9194191687.

It is an arithmetic number, because the mean of its divisors is an integer number (9194191687).

Almost surely, 2^18388383373 is an apocalyptic number.

It is an amenable number.

18388383373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18388383373 is an equidigital number, since it uses as much as digits as its factorization.

18388383373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 55.

The spelling of 18388383373 in words is "eighteen billion, three hundred eighty-eight million, three hundred eighty-three thousand, three hundred seventy-three".