18100003 has 2 divisors, whose sum is σ = 18100004. Its totient is φ = 18100002.

The previous prime is 18099997. The next prime is 18100007. The reversal of 18100003 is 30000181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18100003 - 2⁵ = 18099971 is a prime.

It is a super-2 number, since 2×18100003² = 655220217200018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18100007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9050001 + 9050002.

It is an arithmetic number, because the mean of its divisors is an integer number (9050002).

Almost surely, 2^18100003 is an apocalyptic number.

18100003 is a deficient number, since it is larger than the sum of its proper divisors (1).

18100003 is an equidigital number, since it uses as much as digits as its factorization.

18100003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 18100003 is about 4254.4098298119. The cubic root of 18100003 is about 262.5585804256.

Adding to 18100003 its reverse (30000181), we get a palindrome (48100184).

The spelling of 18100003 in words is "eighteen million, one hundred thousand, three".