13533414421 has 4 divisors (see below), whose sum is σ = 13534195500. Its totient is φ = 13532633344.

The previous prime is 13533414379. The next prime is 13533414431. The reversal of 13533414421 is 12441433531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12441433531 = 757 ⋅16435183.

It can be written as a sum of positive squares in 2 ways, for example, as 10411957521 + 3121456900 = 102039^2 + 55870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13533414421 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 (13533414431) 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, 363946 + ... + 399403.

It is an arithmetic number, because the mean of its divisors is an integer number (3383548875).

Almost surely, 2^13533414421 is an apocalyptic number.

It is an amenable number.

13533414421 is a deficient number, since it is larger than the sum of its proper divisors (781079).

13533414421 is an equidigital number, since it uses as much as digits as its factorization.

13533414421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781078.

The product of its digits is 17280, while the sum is 31.

Adding to 13533414421 its reverse (12441433531), we get a palindrome (25974847952).

The spelling of 13533414421 in words is "thirteen billion, five hundred thirty-three million, four hundred fourteen thousand, four hundred twenty-one".