18080903 has 2 divisors, whose sum is σ = 18080904. Its totient is φ = 18080902.

The previous prime is 18080899. The next prime is 18080939. The reversal of 18080903 is 30908081.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (30908081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18080903 - 2² = 18080899 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18080003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9040451 + 9040452.

It is an arithmetic number, because the mean of its divisors is an integer number (9040452).

Almost surely, 2^18080903 is an apocalyptic number.

18080903 is a deficient number, since it is larger than the sum of its proper divisors (1).

18080903 is an equidigital number, since it uses as much as digits as its factorization.

18080903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 18080903 is about 4252.1645076361. The cubic root of 18080903 is about 262.4661930763.

Adding to 18080903 its reverse (30908081), we get a palindrome (48988984).

The spelling of 18080903 in words is "eighteen million, eighty thousand, nine hundred three".