18183149993 has 2 divisors, whose sum is σ = 18183149994. Its totient is φ = 18183149992.

The previous prime is 18183149939. The next prime is 18183150001. The reversal of 18183149993 is 39994138181.

Together with previous prime (18183149939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17445918889 + 737231104 = 132083^2 + 27152^2 .

It is an emirp because it is prime and its reverse (39994138181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18183149993 - 2¹⁴ = 18183133609 is a prime.

It is not a weakly prime, because it can be changed into another prime (18183149923) 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, 9091574996 + 9091574997.

It is an arithmetic number, because the mean of its divisors is an integer number (9091574997).

Almost surely, 2^18183149993 is an apocalyptic number.

It is an amenable number.

18183149993 is a deficient number, since it is larger than the sum of its proper divisors (1).

18183149993 is an equidigital number, since it uses as much as digits as its factorization.

18183149993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 56.

The spelling of 18183149993 in words is "eighteen billion, one hundred eighty-three million, one hundred forty-nine thousand, nine hundred ninety-three".