13819880447 has 4 divisors (see below), whose sum is σ = 13827513336. Its totient is φ = 13812247560.

The previous prime is 13819880443. The next prime is 13819880449. The reversal of 13819880447 is 74408891831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13819880447 - 2² = 13819880443 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 (13819880443) 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, 3813728 + ... + 3817349.

It is an arithmetic number, because the mean of its divisors is an integer number (3456878334).

Almost surely, 2^13819880447 is an apocalyptic number.

13819880447 is a deficient number, since it is larger than the sum of its proper divisors (7632889).

13819880447 is an equidigital number, since it uses as much as digits as its factorization.

13819880447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632888.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 13819880447 in words is "thirteen billion, eight hundred nineteen million, eight hundred eighty thousand, four hundred forty-seven".