13503403421 has 8 divisors (see below), whose sum is σ = 13534655904. Its totient is φ = 13472172720.

The previous prime is 13503403373. The next prime is 13503403457. The reversal of 13503403421 is 12430430531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13503403421 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 (13503402421) 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, 2171006 + ... + 2177216.

It is an arithmetic number, because the mean of its divisors is an integer number (1691831988).

Almost surely, 2^13503403421 is an apocalyptic number.

It is an amenable number.

13503403421 is a deficient number, since it is larger than the sum of its proper divisors (31252483).

13503403421 is an equidigital number, since it uses as much as digits as its factorization.

13503403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10891.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 13503403421 its reverse (12430430531), we get a palindrome (25933833952).

The spelling of 13503403421 in words is "thirteen billion, five hundred three million, four hundred three thousand, four hundred twenty-one".