18898330513 has 2 divisors, whose sum is σ = 18898330514. Its totient is φ = 18898330512.

The previous prime is 18898330459. The next prime is 18898330541. The reversal of 18898330513 is 31503389881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18810945409 + 87385104 = 137153^2 + 9348^2 .

It is a cyclic number.

It is not a de Polignac number, because 18898330513 - 2⁹ = 18898330001 is a prime.

It is not a weakly prime, because it can be changed into another prime (18898330553) 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, 9449165256 + 9449165257.

It is an arithmetic number, because the mean of its divisors is an integer number (9449165257).

Almost surely, 2^18898330513 is an apocalyptic number.

It is an amenable number.

18898330513 is a deficient number, since it is larger than the sum of its proper divisors (1).

18898330513 is an equidigital number, since it uses as much as digits as its factorization.

18898330513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 18898330513 in words is "eighteen billion, eight hundred ninety-eight million, three hundred thirty thousand, five hundred thirteen".