18135398938919 has 2 divisors, whose sum is σ = 18135398938920. Its totient is φ = 18135398938918.

The previous prime is 18135398938913. The next prime is 18135398938933. The reversal of 18135398938919 is 91983989353181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18135398938919 - 2¹² = 18135398934823 is a prime.

It is a super-2 number, since 2×18135398938919² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18135398938919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18135398938913) 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, 9067699469459 + 9067699469460.

It is an arithmetic number, because the mean of its divisors is an integer number (9067699469460).

Almost surely, 2^{18135398938919} is an apocalyptic number.

18135398938919 is a deficient number, since it is larger than the sum of its proper divisors (1).

18135398938919 is an equidigital number, since it uses as much as digits as its factorization.

18135398938919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453496320, while the sum is 77.

The spelling of 18135398938919 in words is "eighteen trillion, one hundred thirty-five billion, three hundred ninety-eight million, nine hundred thirty-eight thousand, nine hundred nineteen".