18315334207 has 2 divisors, whose sum is σ = 18315334208. Its totient is φ = 18315334206.

The previous prime is 18315334157. The next prime is 18315334231. The reversal of 18315334207 is 70243351381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18315334207 - 2¹¹ = 18315332159 is a prime.

It is a super-2 number, since 2×18315334207² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18315334267) 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, 9157667103 + 9157667104.

It is an arithmetic number, because the mean of its divisors is an integer number (9157667104).

Almost surely, 2^18315334207 is an apocalyptic number.

18315334207 is a deficient number, since it is larger than the sum of its proper divisors (1).

18315334207 is an equidigital number, since it uses as much as digits as its factorization.

18315334207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 18315334207 its reverse (70243351381), we get a palindrome (88558685588).

The spelling of 18315334207 in words is "eighteen billion, three hundred fifteen million, three hundred thirty-four thousand, two hundred seven".