23305813 has 2 divisors, whose sum is σ = 23305814. Its totient is φ = 23305812.

The previous prime is 23305811. The next prime is 23305829. The reversal of 23305813 is 31850332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13527684 + 9778129 = 3678^2 + 3127^2 .

It is a cyclic number.

It is not a de Polignac number, because 23305813 - 2¹ = 23305811 is a prime.

Together with 23305811, 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 (23305811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11652906 + 11652907.

It is an arithmetic number, because the mean of its divisors is an integer number (11652907).

Almost surely, 2^23305813 is an apocalyptic number.

It is an amenable number.

23305813 is a deficient number, since it is larger than the sum of its proper divisors (1).

23305813 is an equidigital number, since it uses as much as digits as its factorization.

23305813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 23305813 is about 4827.6094498209. The cubic root of 23305813 is about 285.6415750572.

The spelling of 23305813 in words is "twenty-three million, three hundred five thousand, eight hundred thirteen".