23299021 has 2 divisors, whose sum is σ = 23299022. Its totient is φ = 23299020.

The previous prime is 23299019. The next prime is 23299033. The reversal of 23299021 is 12099232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 546121 = 4770^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 23299021 - 2¹ = 23299019 is a prime.

Together with 23299019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23299051) 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, 11649510 + 11649511.

It is an arithmetic number, because the mean of its divisors is an integer number (11649511).

Almost surely, 2^23299021 is an apocalyptic number.

It is an amenable number.

23299021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23299021 is an equidigital number, since it uses as much as digits as its factorization.

23299021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 23299021 is about 4826.9059448056. The cubic root of 23299021 is about 285.6138242399.

The spelling of 23299021 in words is "twenty-three million, two hundred ninety-nine thousand, twenty-one".