13220043338 has 4 divisors (see below), whose sum is σ = 19830065010. Its totient is φ = 6610021668.

The previous prime is 13220043337. The next prime is 13220043377. The reversal of 13220043338 is 83334002231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83334002231 = 101 ⋅825089131.

It can be written as a sum of positive squares in only one way, i.e., 12304799329 + 915244009 = 110927^2 + 30253^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13220043338.

It is not an unprimeable number, because it can be changed into a prime (13220043337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305010833 + ... + 3305010836.

Almost surely, 2^13220043338 is an apocalyptic number.

13220043338 is a deficient number, since it is larger than the sum of its proper divisors (6610021672).

13220043338 is an equidigital number, since it uses as much as digits as its factorization.

13220043338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610021671.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 13220043338 its reverse (83334002231), we get a palindrome (96554045569).

The spelling of 13220043338 in words is "thirteen billion, two hundred twenty million, forty-three thousand, three hundred thirty-eight".