23320181 has 2 divisors, whose sum is σ = 23320182. Its totient is φ = 23320180.

The previous prime is 23320151. The next prime is 23320237. The reversal of 23320181 is 18102332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19439281 + 3880900 = 4409^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 23320181 - 2¹⁸ = 23058037 is a prime.

It is a super-2 number, since 2×23320181² = 1087661683745522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23320111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11660090 + 11660091.

It is an arithmetic number, because the mean of its divisors is an integer number (11660091).

Almost surely, 2^23320181 is an apocalyptic number.

It is an amenable number.

23320181 is a deficient number, since it is larger than the sum of its proper divisors (1).

23320181 is an equidigital number, since it uses as much as digits as its factorization.

23320181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 23320181 is about 4829.0973276587. The cubic root of 23320181 is about 285.7002622046.

The spelling of 23320181 in words is "twenty-three million, three hundred twenty thousand, one hundred eighty-one".