13820445687 has 4 divisors (see below), whose sum is σ = 18427260920. Its totient is φ = 9213630456.

The previous prime is 13820445673. The next prime is 13820445707. The reversal of 13820445687 is 78654402831.

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

It is not a de Polignac number, because 13820445687 - 2⁷ = 13820445559 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 (13820455687) 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, 2303407612 + ... + 2303407617.

It is an arithmetic number, because the mean of its divisors is an integer number (4606815230).

Almost surely, 2^13820445687 is an apocalyptic number.

13820445687 is a deficient number, since it is larger than the sum of its proper divisors (4606815233).

13820445687 is an equidigital number, since it uses as much as digits as its factorization.

13820445687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4606815232.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 13820445687 in words is "thirteen billion, eight hundred twenty million, four hundred forty-five thousand, six hundred eighty-seven".