22004523 has 6 divisors (see below), whose sum is σ = 31784324. Its totient is φ = 14669676.

The previous prime is 22004497. The next prime is 22004539. The reversal of 22004523 is 32540022.

It is not a de Polignac number, because 22004523 - 2⁶ = 22004459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22004496 and 22004505.

It is not an unprimeable number, because it can be changed into a prime (22004923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1222465 + ... + 1222482.

Almost surely, 2^22004523 is an apocalyptic number.

22004523 is a deficient number, since it is larger than the sum of its proper divisors (9779801).

22004523 is a wasteful number, since it uses less digits than its factorization.

22004523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444953 (or 2444950 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22004523 is about 4690.8978884644. The cubic root of 22004523 is about 280.2231342102.

Adding to 22004523 its reverse (32540022), we get a palindrome (54544545).

The spelling of 22004523 in words is "twenty-two million, four thousand, five hundred twenty-three".