13220621606 has 4 divisors (see below), whose sum is σ = 19830932412. Its totient is φ = 6610310802.

The previous prime is 13220621599. The next prime is 13220621611. The reversal of 13220621606 is 60612602231.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305155400 + ... + 3305155403.

It is an arithmetic number, because the mean of its divisors is an integer number (4957733103).

Almost surely, 2^13220621606 is an apocalyptic number.

13220621606 is a deficient number, since it is larger than the sum of its proper divisors (6610310806).

13220621606 is an equidigital number, since it uses as much as digits as its factorization.

13220621606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610310805.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 13220621606 in words is "thirteen billion, two hundred twenty million, six hundred twenty-one thousand, six hundred six".