18003107 has 4 divisors (see below), whose sum is σ = 18073416. Its totient is φ = 17932800.

The previous prime is 18003079. The next prime is 18003121. The reversal of 18003107 is 70130081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18003107 - 2⁸ = 18002851 is a prime.

It is a super-2 number, since 2×18003107² = 648223723306898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18003137) 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 in 3 ways as a sum of consecutive naturals, for example, 34769 + ... + 35282.

It is an arithmetic number, because the mean of its divisors is an integer number (4518354).

Almost surely, 2^18003107 is an apocalyptic number.

18003107 is a deficient number, since it is larger than the sum of its proper divisors (70309).

18003107 is an equidigital number, since it uses as much as digits as its factorization.

18003107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70308.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 18003107 is about 4243.0068347812. The cubic root of 18003107 is about 262.0892175228.

Adding to 18003107 its reverse (70130081), we get a palindrome (88133188).

The spelling of 18003107 in words is "eighteen million, three thousand, one hundred seven".