18082003 has 2 divisors, whose sum is σ = 18082004. Its totient is φ = 18082002.

The previous prime is 18081991. The next prime is 18082007. The reversal of 18082003 is 30028081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18082003 - 2¹⁷ = 17950931 is a prime.

It is not a weakly prime, because it can be changed into another prime (18082007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9041001 + 9041002.

It is an arithmetic number, because the mean of its divisors is an integer number (9041002).

Almost surely, 2^18082003 is an apocalyptic number.

18082003 is a deficient number, since it is larger than the sum of its proper divisors (1).

18082003 is an equidigital number, since it uses as much as digits as its factorization.

18082003 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 22.

The square root of 18082003 is about 4252.2938515582. The cubic root of 18082003 is about 262.4715155789.

The spelling of 18082003 in words is "eighteen million, eighty-two thousand, three".