22204643 has 4 divisors (see below), whose sum is σ = 22217760. Its totient is φ = 22191528.

The previous prime is 22204639. The next prime is 22204661. The reversal of 22204643 is 34640222.

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 22204643 - 2² = 22204639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22204943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3563 + ... + 7556.

It is an arithmetic number, because the mean of its divisors is an integer number (5554440).

Almost surely, 2^22204643 is an apocalyptic number.

22204643 is a deficient number, since it is larger than the sum of its proper divisors (13117).

22204643 is a wasteful number, since it uses less digits than its factorization.

22204643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13116.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 22204643 is about 4712.1802809315. The cubic root of 22204643 is about 281.0700677590.

Adding to 22204643 its reverse (34640222), we get a palindrome (56844865).

The spelling of 22204643 in words is "twenty-two million, two hundred four thousand, six hundred forty-three".