22504421 has 2 divisors, whose sum is σ = 22504422. Its totient is φ = 22504420.

The previous prime is 22504403. The next prime is 22504453. The reversal of 22504421 is 12440522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21669025 + 835396 = 4655^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 22504421 - 2¹⁸ = 22242277 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22504393 and 22504402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22584421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11252210 + 11252211.

It is an arithmetic number, because the mean of its divisors is an integer number (11252211).

Almost surely, 2^22504421 is an apocalyptic number.

It is an amenable number.

22504421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22504421 is an equidigital number, since it uses as much as digits as its factorization.

22504421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22504421 is about 4743.8824816810. The cubic root of 22504421 is about 282.3292977658.

Adding to 22504421 its reverse (12440522), we get a palindrome (34944943).

The spelling of 22504421 in words is "twenty-two million, five hundred four thousand, four hundred twenty-one".