18335185189 has 2 divisors, whose sum is σ = 18335185190. Its totient is φ = 18335185188.

The previous prime is 18335185177. The next prime is 18335185201. The reversal of 18335185189 is 98158153381.

It is a balanced prime because it is at equal distance from previous prime (18335185177) and next prime (18335185201).

It can be written as a sum of positive squares in only one way, i.e., 13541976900 + 4793208289 = 116370^2 + 69233^2 .

It is a cyclic number.

It is not a de Polignac number, because 18335185189 - 2⁷ = 18335185061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18335185109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9167592594 + 9167592595.

It is an arithmetic number, because the mean of its divisors is an integer number (9167592595).

Almost surely, 2^18335185189 is an apocalyptic number.

It is an amenable number.

18335185189 is a deficient number, since it is larger than the sum of its proper divisors (1).

18335185189 is an equidigital number, since it uses as much as digits as its factorization.

18335185189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 52.

The spelling of 18335185189 in words is "eighteen billion, three hundred thirty-five million, one hundred eighty-five thousand, one hundred eighty-nine".