18385433219 has 2 divisors, whose sum is σ = 18385433220. Its totient is φ = 18385433218.

The previous prime is 18385433167. The next prime is 18385433233. The reversal of 18385433219 is 91233458381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18385433219 - 2¹² = 18385429123 is a prime.

It is a super-2 number, since 2×18385433219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18385433299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9192716609 + 9192716610.

It is an arithmetic number, because the mean of its divisors is an integer number (9192716610).

Almost surely, 2^18385433219 is an apocalyptic number.

18385433219 is a deficient number, since it is larger than the sum of its proper divisors (1).

18385433219 is an equidigital number, since it uses as much as digits as its factorization.

18385433219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The spelling of 18385433219 in words is "eighteen billion, three hundred eighty-five million, four hundred thirty-three thousand, two hundred nineteen".