22005442 has 4 divisors (see below), whose sum is σ = 33008166. Its totient is φ = 11002720.

The previous prime is 22005419. The next prime is 22005449. The reversal of 22005442 is 24450022.

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., 12327121 + 9678321 = 3511^2 + 3111^2 .

It is not an unprimeable number, because it can be changed into a prime (22005449) by changing a digit.

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, 5501359 + ... + 5501362.

Almost surely, 2^22005442 is an apocalyptic number.

22005442 is a deficient number, since it is larger than the sum of its proper divisors (11002724).

22005442 is a wasteful number, since it uses less digits than its factorization.

22005442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002723.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 22005442 is about 4690.9958431020. The cubic root of 22005442 is about 280.2270352487.

Adding to 22005442 its reverse (24450022), we get a palindrome (46455464).

The spelling of 22005442 in words is "twenty-two million, five thousand, four hundred forty-two".