18430764797 has 2 divisors, whose sum is σ = 18430764798. Its totient is φ = 18430764796.

The previous prime is 18430764767. The next prime is 18430764811. The reversal of 18430764797 is 79746703481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18180207556 + 250557241 = 134834^2 + 15829^2 .

It is a cyclic number.

It is not a de Polignac number, because 18430764797 - 2⁶ = 18430764733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18430764767) 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, 9215382398 + 9215382399.

It is an arithmetic number, because the mean of its divisors is an integer number (9215382399).

Almost surely, 2^18430764797 is an apocalyptic number.

It is an amenable number.

18430764797 is a deficient number, since it is larger than the sum of its proper divisors (1).

18430764797 is an equidigital number, since it uses as much as digits as its factorization.

18430764797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7112448, while the sum is 56.

The spelling of 18430764797 in words is "eighteen billion, four hundred thirty million, seven hundred sixty-four thousand, seven hundred ninety-seven".