23668681 has 2 divisors, whose sum is σ = 23668682. Its totient is φ = 23668680.

The previous prime is 23668663. The next prime is 23668739. The reversal of 23668681 is 18686632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22240656 + 1428025 = 4716^2 + 1195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23668681 is a prime.

It is a super-2 number, since 2×23668681² = 1120412920559522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23668651) 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, 11834340 + 11834341.

It is an arithmetic number, because the mean of its divisors is an integer number (11834341).

Almost surely, 2^23668681 is an apocalyptic number.

It is an amenable number.

23668681 is a deficient number, since it is larger than the sum of its proper divisors (1).

23668681 is an equidigital number, since it uses as much as digits as its factorization.

23668681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 23668681 is about 4865.0468651391. The cubic root of 23668681 is about 287.1164124459.

The spelling of 23668681 in words is "twenty-three million, six hundred sixty-eight thousand, six hundred eighty-one".