13534203421 has 8 divisors (see below), whose sum is σ = 14953391424. Its totient is φ = 12184244160.

The previous prime is 13534203409. The next prime is 13534203433. The reversal of 13534203421 is 12430243531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13534203409) and next prime (13534203433).

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 13534203421 - 2¹⁵ = 13534170653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13534203421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13534203491) 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, 17306775 + ... + 17307556.

It is an arithmetic number, because the mean of its divisors is an integer number (1869173928).

Almost surely, 2^13534203421 is an apocalyptic number.

It is an amenable number.

13534203421 is a deficient number, since it is larger than the sum of its proper divisors (1419188003).

13534203421 is a wasteful number, since it uses less digits than its factorization.

13534203421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34614371.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 13534203421 its reverse (12430243531), we get a palindrome (25964446952).

The spelling of 13534203421 in words is "thirteen billion, five hundred thirty-four million, two hundred three thousand, four hundred twenty-one".