22354030021 has 2 divisors, whose sum is σ = 22354030022. Its totient is φ = 22354030020.

The previous prime is 22354029983. The next prime is 22354030051. The reversal of 22354030021 is 12003045322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22312890625 + 41139396 = 149375^2 + 6414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22354030021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22354029974 and 22354030001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22354030051) 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, 11177015010 + 11177015011.

It is an arithmetic number, because the mean of its divisors is an integer number (11177015011).

Almost surely, 2^22354030021 is an apocalyptic number.

It is an amenable number.

22354030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22354030021 is an equidigital number, since it uses as much as digits as its factorization.

22354030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 22354030021 its reverse (12003045322), we get a palindrome (34357075343).

The spelling of 22354030021 in words is "twenty-two billion, three hundred fifty-four million, thirty thousand, twenty-one".