18630103 has 4 divisors (see below), whose sum is σ = 18839520. Its totient is φ = 18420688.

The previous prime is 18630077. The next prime is 18630107. The reversal of 18630103 is 30103681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30103681 = 37 ⋅813613.

It is a cyclic number.

It is not a de Polignac number, because 18630103 - 2¹⁷ = 18499031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18630107) 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 in 3 ways as a sum of consecutive naturals, for example, 104575 + ... + 104752.

It is an arithmetic number, because the mean of its divisors is an integer number (4709880).

Almost surely, 2^18630103 is an apocalyptic number.

18630103 is a deficient number, since it is larger than the sum of its proper divisors (209417).

18630103 is an equidigital number, since it uses as much as digits as its factorization.

18630103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209416.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 18630103 is about 4316.2603026231. The cubic root of 18630103 is about 265.0971662194.

Adding to 18630103 its reverse (30103681), we get a palindrome (48733784).

The spelling of 18630103 in words is "eighteen million, six hundred thirty thousand, one hundred three".