13628044221 has 32 divisors (see below), whose sum is σ = 20163102336. Its totient is φ = 8117760000.

The previous prime is 13628044219. The next prime is 13628044229. The reversal of 13628044221 is 12244082631.

It is not a de Polignac number, because 13628044221 - 2¹ = 13628044219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13628044229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4864021 + ... + 4866821.

It is an arithmetic number, because the mean of its divisors is an integer number (630096948).

Almost surely, 2^13628044221 is an apocalyptic number.

13628044221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13628044221 is a deficient number, since it is larger than the sum of its proper divisors (6535058115).

13628044221 is a wasteful number, since it uses less digits than its factorization.

13628044221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5293.

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 13628044221 in words is "thirteen billion, six hundred twenty-eight million, forty-four thousand, two hundred twenty-one".