13320503 has 12 divisors (see below), whose sum is σ = 16407792. Its totient is φ = 10745280.

The previous prime is 13320493. The next prime is 13320521. The reversal of 13320503 is 30502331.

13320503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13320503 - 2⁸ = 13320247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7163 + ... + 8828.

It is an arithmetic number, because the mean of its divisors is an integer number (1367316).

Almost surely, 2^13320503 is an apocalyptic number.

13320503 is a deficient number, since it is larger than the sum of its proper divisors (3087289).

13320503 is a wasteful number, since it uses less digits than its factorization.

13320503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16022 (or 16015 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 13320503 is about 3649.7264281039. The cubic root of 13320503 is about 237.0501356781.

Adding to 13320503 its reverse (30502331), we get a palindrome (43822834).

The spelling of 13320503 in words is "thirteen million, three hundred twenty thousand, five hundred three".