23404322021 has 2 divisors, whose sum is σ = 23404322022. Its totient is φ = 23404322020.

The previous prime is 23404322017. The next prime is 23404322033. The reversal of 23404322021 is 12022340432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17171219521 + 6233102500 = 131039^2 + 78950^2 .

It is a cyclic number.

It is not a de Polignac number, because 23404322021 - 2² = 23404322017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23404322521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11702161010 + 11702161011.

It is an arithmetic number, because the mean of its divisors is an integer number (11702161011).

Almost surely, 2^23404322021 is an apocalyptic number.

It is an amenable number.

23404322021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23404322021 is an equidigital number, since it uses as much as digits as its factorization.

23404322021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 23404322021 its reverse (12022340432), we get a palindrome (35426662453).

The spelling of 23404322021 in words is "twenty-three billion, four hundred four million, three hundred twenty-two thousand, twenty-one".