13746387221 has 32 divisors (see below), whose sum is σ = 16873920000. Its totient is φ = 10930563072.

The previous prime is 13746387203. The next prime is 13746387251. The reversal of 13746387221 is 12278364731.

13746387221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13746387221 - 2³⁰ = 12672645397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13746387251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3694400 + ... + 3698118.

It is an arithmetic number, because the mean of its divisors is an integer number (527310000).

Almost surely, 2^13746387221 is an apocalyptic number.

It is an amenable number.

13746387221 is a deficient number, since it is larger than the sum of its proper divisors (3127532779).

13746387221 is a wasteful number, since it uses less digits than its factorization.

13746387221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181.

The product of its digits is 338688, while the sum is 44.

The spelling of 13746387221 in words is "thirteen billion, seven hundred forty-six million, three hundred eighty-seven thousand, two hundred twenty-one".