21032423033 has 2 divisors, whose sum is σ = 21032423034. Its totient is φ = 21032423032.

The previous prime is 21032423017. The next prime is 21032423057. The reversal of 21032423033 is 33032423012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20452432144 + 579990889 = 143012^2 + 24083^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032423033 - 2⁴ = 21032423017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21032423003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516211516 + 10516211517.

It is an arithmetic number, because the mean of its divisors is an integer number (10516211517).

Almost surely, 2^21032423033 is an apocalyptic number.

It is an amenable number.

21032423033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032423033 is an equidigital number, since it uses as much as digits as its factorization.

21032423033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21032423033 its reverse (33032423012), we get a palindrome (54064846045).

The spelling of 21032423033 in words is "twenty-one billion, thirty-two million, four hundred twenty-three thousand, thirty-three".