18238472143 has 2 divisors, whose sum is σ = 18238472144. Its totient is φ = 18238472142.

The previous prime is 18238472129. The next prime is 18238472237. The reversal of 18238472143 is 34127483281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18238472143 - 2⁵ = 18238472111 is a prime.

It is a super-2 number, since 2×18238472143² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18238472143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18238478143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9119236071 + 9119236072.

It is an arithmetic number, because the mean of its divisors is an integer number (9119236072).

Almost surely, 2^18238472143 is an apocalyptic number.

18238472143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18238472143 is an equidigital number, since it uses as much as digits as its factorization.

18238472143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The spelling of 18238472143 in words is "eighteen billion, two hundred thirty-eight million, four hundred seventy-two thousand, one hundred forty-three".