13205445403503 has 16 divisors (see below), whose sum is σ = 17778389481216. Its totient is φ = 8718067573440.

The previous prime is 13205445403499. The next prime is 13205445403517. The reversal of 13205445403503 is 30530454450231.

It is not a de Polignac number, because 13205445403503 - 2² = 13205445403499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13205445403543) 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, 43467376 + ... + 43770122.

It is an arithmetic number, because the mean of its divisors is an integer number (1111149342576).

Almost surely, 2^{13205445403503} is an apocalyptic number.

13205445403503 is a deficient number, since it is larger than the sum of its proper divisors (4572944077713).

13205445403503 is a wasteful number, since it uses less digits than its factorization.

13205445403503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444014.

The product of its (nonzero) digits is 432000, while the sum is 39.

Adding to 13205445403503 its reverse (30530454450231), we get a palindrome (43735899853734).

The spelling of 13205445403503 in words is "thirteen trillion, two hundred five billion, four hundred forty-five million, four hundred three thousand, five hundred three".