18078903 has 16 divisors (see below), whose sum is σ = 27508960. Its totient is φ = 11726208.

The previous prime is 18078857. The next prime is 18078911. The reversal of 18078903 is 30987081.

It is not a de Polignac number, because 18078903 - 2⁸ = 18078647 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 (18077903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8050 + ... + 10047.

It is an arithmetic number, because the mean of its divisors is an integer number (1719310).

Almost surely, 2^18078903 is an apocalyptic number.

18078903 is a deficient number, since it is larger than the sum of its proper divisors (9430057).

18078903 is a wasteful number, since it uses less digits than its factorization.

18078903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18143 (or 18137 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18078903 is about 4251.9293267880. The cubic root of 18078903 is about 262.4565152459.

It can be divided in two parts, 18078 and 903, that added together give a palindrome (18981).

The spelling of 18078903 in words is "eighteen million, seventy-eight thousand, nine hundred three".