18281754187 has 2 divisors, whose sum is σ = 18281754188. Its totient is φ = 18281754186.

The previous prime is 18281754149. The next prime is 18281754199. The reversal of 18281754187 is 78145718281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18281754187 is a prime.

It is not a weakly prime, because it can be changed into another prime (18281764187) 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, 9140877093 + 9140877094.

It is an arithmetic number, because the mean of its divisors is an integer number (9140877094).

Almost surely, 2^18281754187 is an apocalyptic number.

18281754187 is a deficient number, since it is larger than the sum of its proper divisors (1).

18281754187 is an equidigital number, since it uses as much as digits as its factorization.

18281754187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1003520, while the sum is 52.

The spelling of 18281754187 in words is "eighteen billion, two hundred eighty-one million, seven hundred fifty-four thousand, one hundred eighty-seven".