23230000021 has 2 divisors, whose sum is σ = 23230000022. Its totient is φ = 23230000020.

The previous prime is 23229999983. The next prime is 23230000049. The reversal of 23230000021 is 12000003232.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19479784900 + 3750215121 = 139570^2 + 61239^2 .

It is a cyclic number.

It is not a de Polignac number, because 23230000021 - 2⁷ = 23229999893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23229999956 and 23230000010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23230001021) 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, 11615000010 + 11615000011.

It is an arithmetic number, because the mean of its divisors is an integer number (11615000011).

Almost surely, 2^23230000021 is an apocalyptic number.

It is an amenable number.

23230000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23230000021 is an equidigital number, since it uses as much as digits as its factorization.

23230000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 23230000021 its reverse (12000003232), we get a palindrome (35230003253).

The spelling of 23230000021 in words is "twenty-three billion, two hundred thirty million, twenty-one", and thus it is an aban number.