23668181 has 2 divisors, whose sum is σ = 23668182. Its totient is φ = 23668180.

The previous prime is 23668153. The next prime is 23668207. The reversal of 23668181 is 18186632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22648081 + 1020100 = 4759^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 23668181 - 2¹⁸ = 23406037 is a prime.

It is a super-2 number, since 2×23668181² = 1120365583697522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23668481) 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, 11834090 + 11834091.

It is an arithmetic number, because the mean of its divisors is an integer number (11834091).

Almost surely, 2^23668181 is an apocalyptic number.

It is an amenable number.

23668181 is a deficient number, since it is larger than the sum of its proper divisors (1).

23668181 is an equidigital number, since it uses as much as digits as its factorization.

23668181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 23668181 is about 4864.9954779013. The cubic root of 23668181 is about 287.1143906572.

The spelling of 23668181 in words is "twenty-three million, six hundred sixty-eight thousand, one hundred eighty-one".