13223020442 has 4 divisors (see below), whose sum is σ = 19834530666. Its totient is φ = 6611510220.

The previous prime is 13223020411. The next prime is 13223020451. The reversal of 13223020442 is 24402032231.

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., 12932010961 + 291009481 = 113719^2 + 17059^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305755109 + ... + 3305755112.

Almost surely, 2^13223020442 is an apocalyptic number.

13223020442 is a deficient number, since it is larger than the sum of its proper divisors (6611510224).

13223020442 is an equidigital number, since it uses as much as digits as its factorization.

13223020442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6611510223.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 13223020442 its reverse (24402032231), we get a palindrome (37625052673).

The spelling of 13223020442 in words is "thirteen billion, two hundred twenty-three million, twenty thousand, four hundred forty-two".