22004321 has 2 divisors, whose sum is σ = 22004322. Its totient is φ = 22004320.

The previous prime is 22004303. The next prime is 22004329. The reversal of 22004321 is 12340022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21529600 + 474721 = 4640^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 22004321 - 2¹⁰ = 22003297 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22004296 and 22004305.

It is not a weakly prime, because it can be changed into another prime (22004329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11002160 + 11002161.

It is an arithmetic number, because the mean of its divisors is an integer number (11002161).

Almost surely, 2^22004321 is an apocalyptic number.

It is an amenable number.

22004321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22004321 is an equidigital number, since it uses as much as digits as its factorization.

22004321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22004321 is about 4690.8763573558. The cubic root of 22004321 is about 280.2222767312. Note that the first 4 decimals are identical.

Adding to 22004321 its reverse (12340022), we get a palindrome (34344343).

The spelling of 22004321 in words is "twenty-two million, four thousand, three hundred twenty-one".