22004645 has 12 divisors (see below), whose sum is σ = 28594116. Its totient is φ = 16248960.

The previous prime is 22004639. The next prime is 22004683. The reversal of 22004645 is 54640022.

It can be written as a sum of positive squares in 6 ways, for example, as 863041 + 21141604 = 929^2 + 4598^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22004645 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22004645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12176 + ... + 13865.

It is an arithmetic number, because the mean of its divisors is an integer number (2382843).

Almost surely, 2^22004645 is an apocalyptic number.

It is an amenable number.

22004645 is a deficient number, since it is larger than the sum of its proper divisors (6589471).

22004645 is a wasteful number, since it uses less digits than its factorization.

22004645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26072 (or 26059 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 22004645 is about 4690.9108923534. The cubic root of 22004645 is about 280.2236520910.

Adding to 22004645 its reverse (54640022), we get a palindrome (76644667).

The spelling of 22004645 in words is "twenty-two million, four thousand, six hundred forty-five".