13553340421 has 8 divisors (see below), whose sum is σ = 13758445440. Its totient is φ = 13348318368.

The previous prime is 13553340403. The next prime is 13553340469. The reversal of 13553340421 is 12404335531.

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 13553340421 - 2⁷ = 13553340293 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 (13553340721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361140 + ... + 396898.

It is an arithmetic number, because the mean of its divisors is an integer number (1719805680).

Almost surely, 2^13553340421 is an apocalyptic number.

It is an amenable number.

13553340421 is a deficient number, since it is larger than the sum of its proper divisors (205105019).

13553340421 is an equidigital number, since it uses as much as digits as its factorization.

13553340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41483.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 13553340421 its reverse (12404335531), we get a palindrome (25957675952).

The spelling of 13553340421 in words is "thirteen billion, five hundred fifty-three million, three hundred forty thousand, four hundred twenty-one".