23624021 has 2 divisors, whose sum is σ = 23624022. Its totient is φ = 23624020.

The previous prime is 23624017. The next prime is 23624039. The reversal of 23624021 is 12042632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23280625 + 343396 = 4825^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 23624021 - 2² = 23624017 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23623984 and 23624002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23624521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11812010 + 11812011.

It is an arithmetic number, because the mean of its divisors is an integer number (11812011).

Almost surely, 2^23624021 is an apocalyptic number.

It is an amenable number.

23624021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23624021 is an equidigital number, since it uses as much as digits as its factorization.

23624021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 23624021 is about 4860.4548141095. The cubic root of 23624021 is about 286.9357138487.

Adding to 23624021 its reverse (12042632), we get a palindrome (35666653).

The spelling of 23624021 in words is "twenty-three million, six hundred twenty-four thousand, twenty-one".