13020003 has 12 divisors (see below), whose sum is σ = 18888480. Its totient is φ = 8642256.

The previous prime is 13019999. The next prime is 13020017. The reversal of 13020003 is 30002031.

It is a happy number.

It is not a de Polignac number, because 13020003 - 2² = 13019999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (13020053) 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 in 11 ways as a sum of consecutive naturals, for example, 876 + ... + 5177.

It is an arithmetic number, because the mean of its divisors is an integer number (1574040).

Almost surely, 2^13020003 is an apocalyptic number.

13020003 is a deficient number, since it is larger than the sum of its proper divisors (5868477).

13020003 is a wasteful number, since it uses less digits than its factorization.

13020003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6298 (or 6295 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 13020003 is about 3608.3241262392. The cubic root of 13020003 is about 235.2540063230.

Adding to 13020003 its reverse (30002031), we get a palindrome (43022034).

The spelling of 13020003 in words is "thirteen million, twenty thousand, three".