18018002003 has 2 divisors, whose sum is σ = 18018002004. Its totient is φ = 18018002002.

The previous prime is 18018001997. The next prime is 18018002027. The reversal of 18018002003 is 30020081081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18018002003 - 2⁴ = 18018001987 is a prime.

It is a super-2 number, since 2×18018002003² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18018002003.

It is not a weakly prime, because it can be changed into another prime (18018002503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9009001001 + 9009001002.

It is an arithmetic number, because the mean of its divisors is an integer number (9009001002).

Almost surely, 2^18018002003 is an apocalyptic number.

18018002003 is a deficient number, since it is larger than the sum of its proper divisors (1).

18018002003 is an equidigital number, since it uses as much as digits as its factorization.

18018002003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 18018002003 its reverse (30020081081), we get a palindrome (48038083084).

The spelling of 18018002003 in words is "eighteen billion, eighteen million, two thousand, three".