23784442189 has 2 divisors, whose sum is σ = 23784442190. Its totient is φ = 23784442188.

The previous prime is 23784442151. The next prime is 23784442207. The reversal of 23784442189 is 98124448732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23567469289 + 216972900 = 153517^2 + 14730^2 .

It is a cyclic number.

It is not a de Polignac number, because 23784442189 - 2⁹ = 23784441677 is a prime.

It is a super-2 number, since 2×23784442189² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23784442109) 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, 11892221094 + 11892221095.

It is an arithmetic number, because the mean of its divisors is an integer number (11892221095).

Almost surely, 2^23784442189 is an apocalyptic number.

It is an amenable number.

23784442189 is a deficient number, since it is larger than the sum of its proper divisors (1).

23784442189 is an equidigital number, since it uses as much as digits as its factorization.

23784442189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3096576, while the sum is 52.

The spelling of 23784442189 in words is "twenty-three billion, seven hundred eighty-four million, four hundred forty-two thousand, one hundred eighty-nine".