22003444 has 24 divisors (see below), whose sum is σ = 41481440. Its totient is φ = 10178784.

The previous prime is 22003439. The next prime is 22003451. The reversal of 22003444 is 44430022.

It is a super-2 number, since 2×22003444² = 968303095722272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99 + ... + 6634.

Almost surely, 2^22003444 is an apocalyptic number.

It is an amenable number.

22003444 is a deficient number, since it is larger than the sum of its proper divisors (19477996).

22003444 is a wasteful number, since it uses less digits than its factorization.

22003444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6799 (or 6797 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22003444 is about 4690.7828770899. The cubic root of 22003444 is about 280.2185538533.

Adding to 22003444 its reverse (44430022), we get a palindrome (66433466).

The spelling of 22003444 in words is "twenty-two million, three thousand, four hundred forty-four".