18103116 has 48 divisors (see below), whose sum is σ = 44561664. Its totient is φ = 5708736.

The previous prime is 18103109. The next prime is 18103117. The reversal of 18103116 is 61130181.

It is a junction number, because it is equal to n+sod(n) for n = 18103092 and 18103101.

It is not an unprimeable number, because it can be changed into a prime (18103117) 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 15 ways as a sum of consecutive naturals, for example, 29226 + ... + 29838.

It is an arithmetic number, because the mean of its divisors is an integer number (928368).

Almost surely, 2^18103116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18103116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22280832).

18103116 is an abundant number, since it is smaller than the sum of its proper divisors (26458548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18103116 is a wasteful number, since it uses less digits than its factorization.

18103116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 18103116 is about 4254.7756697622. The cubic root of 18103116 is about 262.5736319518.

Adding to 18103116 its reverse (61130181), we get a palindrome (79233297).

The spelling of 18103116 in words is "eighteen million, one hundred three thousand, one hundred sixteen".