22004239 has 4 divisors (see below), whose sum is σ = 23298624. Its totient is φ = 20709856.

The previous prime is 22004237. The next prime is 22004251. The reversal of 22004239 is 93240022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22004239 - 2¹ = 22004237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22004231) 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 in 3 ways as a sum of consecutive naturals, for example, 647167 + ... + 647200.

It is an arithmetic number, because the mean of its divisors is an integer number (5824656).

Almost surely, 2^22004239 is an apocalyptic number.

22004239 is a deficient number, since it is larger than the sum of its proper divisors (1294385).

22004239 is a wasteful number, since it uses less digits than its factorization.

22004239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294384.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 22004239 is about 4690.8676169766. The cubic root of 22004239 is about 280.2219286442.

The spelling of 22004239 in words is "twenty-two million, four thousand, two hundred thirty-nine".