18468730109 has 2 divisors, whose sum is σ = 18468730110. Its totient is φ = 18468730108.

The previous prime is 18468730061. The next prime is 18468730117. The reversal of 18468730109 is 90103786481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17847624025 + 621106084 = 133595^2 + 24922^2 .

It is a cyclic number.

It is not a de Polignac number, because 18468730109 - 2¹² = 18468726013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18468730169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234365054 + 9234365055.

It is an arithmetic number, because the mean of its divisors is an integer number (9234365055).

Almost surely, 2^18468730109 is an apocalyptic number.

It is an amenable number.

18468730109 is a deficient number, since it is larger than the sum of its proper divisors (1).

18468730109 is an equidigital number, since it uses as much as digits as its factorization.

18468730109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 18468730109 in words is "eighteen billion, four hundred sixty-eight million, seven hundred thirty thousand, one hundred nine".