13929848421 has 4 divisors (see below), whose sum is σ = 18573131232. Its totient is φ = 9286565612.

The previous prime is 13929848411. The next prime is 13929848447. The reversal of 13929848421 is 12484892931.

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 13929848421 - 2⁷ = 13929848293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13929848411) 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, 2321641401 + ... + 2321641406.

It is an arithmetic number, because the mean of its divisors is an integer number (4643282808).

Almost surely, 2^13929848421 is an apocalyptic number.

It is an amenable number.

13929848421 is a deficient number, since it is larger than the sum of its proper divisors (4643282811).

13929848421 is an equidigital number, since it uses as much as digits as its factorization.

13929848421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643282810.

The product of its digits is 995328, while the sum is 51.

The spelling of 13929848421 in words is "thirteen billion, nine hundred twenty-nine million, eight hundred forty-eight thousand, four hundred twenty-one".