22005236 has 12 divisors (see below), whose sum is σ = 42010080. Its totient is φ = 10002360.

The previous prime is 22005199. The next prime is 22005241. The reversal of 22005236 is 63250022.

It is a happy number.

It is a super-2 number, since 2×22005236² = 968460822831392, which contains 22 as substring.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250016 + ... + 250103.

It is an arithmetic number, because the mean of its divisors is an integer number (3500840).

Almost surely, 2^22005236 is an apocalyptic number.

It is an amenable number.

22005236 is a deficient number, since it is larger than the sum of its proper divisors (20004844).

22005236 is a wasteful number, since it uses less digits than its factorization.

22005236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500134 (or 500132 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 22005236 is about 4690.9738860923. The cubic root of 22005236 is about 280.2261608143.

Adding to 22005236 its reverse (63250022), we get a palindrome (85255258).

The spelling of 22005236 in words is "twenty-two million, five thousand, two hundred thirty-six".