23443103440021 has 2 divisors, whose sum is σ = 23443103440022. Its totient is φ = 23443103440020.

The previous prime is 23443103440007. The next prime is 23443103440051. The reversal of 23443103440021 is 12004430134432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20618737497796 + 2824365942225 = 4540786^2 + 1680585^2 .

It is a cyclic number.

It is not a de Polignac number, because 23443103440021 - 2⁷ = 23443103439893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23443103440051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11721551720010 + 11721551720011.

It is an arithmetic number, because the mean of its divisors is an integer number (11721551720011).

Almost surely, 2^{23443103440021} is an apocalyptic number.

It is an amenable number.

23443103440021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23443103440021 is an equidigital number, since it uses as much as digits as its factorization.

23443103440021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 23443103440021 its reverse (12004430134432), we get a palindrome (35447533574453).

The spelling of 23443103440021 in words is "twenty-three trillion, four hundred forty-three billion, one hundred three million, four hundred forty thousand, twenty-one".