18318043207 has 2 divisors, whose sum is σ = 18318043208. Its totient is φ = 18318043206.

The previous prime is 18318043141. The next prime is 18318043259. The reversal of 18318043207 is 70234081381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18318043207 - 2¹⁵ = 18318010439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18318043297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9159021603 + 9159021604.

It is an arithmetic number, because the mean of its divisors is an integer number (9159021604).

Almost surely, 2^18318043207 is an apocalyptic number.

18318043207 is a deficient number, since it is larger than the sum of its proper divisors (1).

18318043207 is an equidigital number, since it uses as much as digits as its factorization.

18318043207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 18318043207 in words is "eighteen billion, three hundred eighteen million, forty-three thousand, two hundred seven".