13503421205 has 8 divisors (see below), whose sum is σ = 16207231032. Its totient is φ = 10800653248.

The previous prime is 13503421189. The next prime is 13503421207. The reversal of 13503421205 is 50212430531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8211440689 + 5291980516 = 90617^2 + 72746^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13503421205 - 2⁴ = 13503421189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13503421207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231662 + ... + 284031.

It is an arithmetic number, because the mean of its divisors is an integer number (2025903879).

Almost surely, 2^13503421205 is an apocalyptic number.

It is an amenable number.

13503421205 is a deficient number, since it is larger than the sum of its proper divisors (2703809827).

13503421205 is an equidigital number, since it uses as much as digits as its factorization.

13503421205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520935.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 13503421205 its reverse (50212430531), we get a palindrome (63715851736).

The spelling of 13503421205 in words is "thirteen billion, five hundred three million, four hundred twenty-one thousand, two hundred five".