18013911593 has 2 divisors, whose sum is σ = 18013911594. Its totient is φ = 18013911592.

The previous prime is 18013911547. The next prime is 18013911667. The reversal of 18013911593 is 39511931081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17884247824 + 129663769 = 133732^2 + 11387^2 .

It is a cyclic number.

It is not a de Polignac number, because 18013911593 - 2¹⁴ = 18013895209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18013911593.

It is not a weakly prime, because it can be changed into another prime (18013011593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006955796 + 9006955797.

It is an arithmetic number, because the mean of its divisors is an integer number (9006955797).

Almost surely, 2^18013911593 is an apocalyptic number.

It is an amenable number.

18013911593 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013911593 is an equidigital number, since it uses as much as digits as its factorization.

18013911593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 41.

The spelling of 18013911593 in words is "eighteen billion, thirteen million, nine hundred eleven thousand, five hundred ninety-three".