18348235937 has 2 divisors, whose sum is σ = 18348235938. Its totient is φ = 18348235936.

The previous prime is 18348235921. The next prime is 18348235967. The reversal of 18348235937 is 73953284381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11525310736 + 6822925201 = 107356^2 + 82601^2 .

It is an emirp because it is prime and its reverse (73953284381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18348235937 - 2⁴ = 18348235921 is a prime.

It is not a weakly prime, because it can be changed into another prime (18348235907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9174117968 + 9174117969.

It is an arithmetic number, because the mean of its divisors is an integer number (9174117969).

Almost surely, 2^18348235937 is an apocalyptic number.

It is an amenable number.

18348235937 is a deficient number, since it is larger than the sum of its proper divisors (1).

18348235937 is an equidigital number, since it uses as much as digits as its factorization.

18348235937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The spelling of 18348235937 in words is "eighteen billion, three hundred forty-eight million, two hundred thirty-five thousand, nine hundred thirty-seven".