18087842593 has 2 divisors, whose sum is σ = 18087842594. Its totient is φ = 18087842592.

The previous prime is 18087842501. The next prime is 18087842603. The reversal of 18087842593 is 39524878081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16443702289 + 1644140304 = 128233^2 + 40548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18087842593 is a prime.

It is not a weakly prime, because it can be changed into another prime (18087842293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9043921296 + 9043921297.

It is an arithmetic number, because the mean of its divisors is an integer number (9043921297).

Almost surely, 2^18087842593 is an apocalyptic number.

It is an amenable number.

18087842593 is a deficient number, since it is larger than the sum of its proper divisors (1).

18087842593 is an equidigital number, since it uses as much as digits as its factorization.

18087842593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 18087842593 in words is "eighteen billion, eighty-seven million, eight hundred forty-two thousand, five hundred ninety-three".