13240000421 has 4 divisors (see below), whose sum is σ = 13241360832. Its totient is φ = 13238640012.

The previous prime is 13240000369. The next prime is 13240000447. The reversal of 13240000421 is 12400004231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13240000421 - 2⁶ = 13240000357 is a prime.

It is a super-2 number, since 2×13240000421² (a number of 21 digits) contains 22 as substring.

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 13240000421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240000321) 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, 665501 + ... + 685106.

It is an arithmetic number, because the mean of its divisors is an integer number (3310340208).

Almost surely, 2^13240000421 is an apocalyptic number.

It is an amenable number.

13240000421 is a deficient number, since it is larger than the sum of its proper divisors (1360411).

13240000421 is an equidigital number, since it uses as much as digits as its factorization.

13240000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360410.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 13240000421 its reverse (12400004231), we get a palindrome (25640004652).

The spelling of 13240000421 in words is "thirteen billion, two hundred forty million, four hundred twenty-one", and thus it is an aban number.