18140503 has 2 divisors, whose sum is σ = 18140504. Its totient is φ = 18140502.

The previous prime is 18140501. The next prime is 18140519. The reversal of 18140503 is 30504181.

It is a weak prime.

It is an emirp because it is prime and its reverse (30504181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18140503 - 2¹ = 18140501 is a prime.

Together with 18140501, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18140501) 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 as a sum of consecutive naturals, namely, 9070251 + 9070252.

It is an arithmetic number, because the mean of its divisors is an integer number (9070252).

Almost surely, 2^18140503 is an apocalyptic number.

18140503 is a deficient number, since it is larger than the sum of its proper divisors (1).

18140503 is an equidigital number, since it uses as much as digits as its factorization.

18140503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18140503 is about 4259.1669373247. The cubic root of 18140503 is about 262.7542654981.

Adding to 18140503 its reverse (30504181), we get a palindrome (48644684).

The spelling of 18140503 in words is "eighteen million, one hundred forty thousand, five hundred three".