13220938 has 4 divisors (see below), whose sum is σ = 19831410. Its totient is φ = 6610468.

The previous prime is 13220899. The next prime is 13220947. The reversal of 13220938 is 83902231.

13220938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 11675889 + 1545049 = 3417^2 + 1243^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305233 + ... + 3305236.

Almost surely, 2^13220938 is an apocalyptic number.

13220938 is a deficient number, since it is larger than the sum of its proper divisors (6610472).

13220938 is an equidigital number, since it uses as much as digits as its factorization.

13220938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610471.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13220938 is about 3636.0607805701. The cubic root of 13220938 is about 236.4580422507.

The spelling of 13220938 in words is "thirteen million, two hundred twenty thousand, nine hundred thirty-eight".