23018813 has 2 divisors, whose sum is σ = 23018814. Its totient is φ = 23018812.

The previous prime is 23018797. The next prime is 23018819. The reversal of 23018813 is 31881032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15077689 + 7941124 = 3883^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 23018813 - 2⁴ = 23018797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23018819) 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, 11509406 + 11509407.

It is an arithmetic number, because the mean of its divisors is an integer number (11509407).

Almost surely, 2^23018813 is an apocalyptic number.

It is an amenable number.

23018813 is a deficient number, since it is larger than the sum of its proper divisors (1).

23018813 is an equidigital number, since it uses as much as digits as its factorization.

23018813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 23018813 is about 4797.7925132294. The cubic root of 23018813 is about 284.4642155051.

Adding to 23018813 its reverse (31881032), we get a palindrome (54899845).

The spelling of 23018813 in words is "twenty-three million, eighteen thousand, eight hundred thirteen".