13553123403 has 4 divisors (see below), whose sum is σ = 18070831208. Its totient is φ = 9035415600.

The previous prime is 13553123393. The next prime is 13553123429. The reversal of 13553123403 is 30432135531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13553123403 - 2¹⁴ = 13553107019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13553123803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258853898 + ... + 2258853903.

It is an arithmetic number, because the mean of its divisors is an integer number (4517707802).

Almost surely, 2^13553123403 is an apocalyptic number.

13553123403 is a deficient number, since it is larger than the sum of its proper divisors (4517707805).

13553123403 is an equidigital number, since it uses as much as digits as its factorization.

13553123403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517707804.

The product of its (nonzero) digits is 16200, while the sum is 30.

Adding to 13553123403 its reverse (30432135531), we get a palindrome (43985258934).

The spelling of 13553123403 in words is "thirteen billion, five hundred fifty-three million, one hundred twenty-three thousand, four hundred three".