23812022021 has 2 divisors, whose sum is σ = 23812022022. Its totient is φ = 23812022020.

The previous prime is 23812021993. The next prime is 23812022053. The reversal of 23812022021 is 12022021832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12789121921 + 11022900100 = 113089^2 + 104990^2 .

It is a cyclic number.

It is not a de Polignac number, because 23812022021 - 2²² = 23807827717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23812022081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11906011010 + 11906011011.

It is an arithmetic number, because the mean of its divisors is an integer number (11906011011).

Almost surely, 2^23812022021 is an apocalyptic number.

It is an amenable number.

23812022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23812022021 is an equidigital number, since it uses as much as digits as its factorization.

23812022021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 23812022021 its reverse (12022021832), we get a palindrome (35834043853).

The spelling of 23812022021 in words is "twenty-three billion, eight hundred twelve million, twenty-two thousand, twenty-one".