18816103 has 4 divisors (see below), whose sum is σ = 19135080. Its totient is φ = 18497128.

The previous prime is 18816097. The next prime is 18816107. The reversal of 18816103 is 30161881.

It is a happy number.

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 18816103 - 2⁹ = 18815591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18816107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159400 + ... + 159517.

It is an arithmetic number, because the mean of its divisors is an integer number (4783770).

Almost surely, 2^18816103 is an apocalyptic number.

18816103 is a deficient number, since it is larger than the sum of its proper divisors (318977).

18816103 is an equidigital number, since it uses as much as digits as its factorization.

18816103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318976.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18816103 is about 4337.7532202743. The cubic root of 18816103 is about 265.9764757684.

Adding to 18816103 its reverse (30161881), we get a palindrome (48977984).

The spelling of 18816103 in words is "eighteen million, eight hundred sixteen thousand, one hundred three".