18446186797 has 2 divisors, whose sum is σ = 18446186798. Its totient is φ = 18446186796.

The previous prime is 18446186779. The next prime is 18446186819. The reversal of 18446186797 is 79768164481.

Together with previous prime (18446186779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14859853801 + 3586332996 = 121901^2 + 59886^2 .

It is a cyclic number.

It is not a de Polignac number, because 18446186797 - 2³¹ = 16298703149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18446186777) 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, 9223093398 + 9223093399.

It is an arithmetic number, because the mean of its divisors is an integer number (9223093399).

Almost surely, 2^18446186797 is an apocalyptic number.

It is an amenable number.

18446186797 is a deficient number, since it is larger than the sum of its proper divisors (1).

18446186797 is an equidigital number, since it uses as much as digits as its factorization.

18446186797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16257024, while the sum is 61.

The spelling of 18446186797 in words is "eighteen billion, four hundred forty-six million, one hundred eighty-six thousand, seven hundred ninety-seven".