22423230421 has 2 divisors, whose sum is σ = 22423230422. Its totient is φ = 22423230420.

The previous prime is 22423230377. The next prime is 22423230433. The reversal of 22423230421 is 12403232422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22419072900 + 4157521 = 149730^2 + 2039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22423230421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22423230491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11211615210 + 11211615211.

It is an arithmetic number, because the mean of its divisors is an integer number (11211615211).

Almost surely, 2^22423230421 is an apocalyptic number.

It is an amenable number.

22423230421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22423230421 is an equidigital number, since it uses as much as digits as its factorization.

22423230421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 22423230421 its reverse (12403232422), we get a palindrome (34826462843).

The spelling of 22423230421 in words is "twenty-two billion, four hundred twenty-three million, two hundred thirty thousand, four hundred twenty-one".