1838178018199 has 2 divisors, whose sum is σ = 1838178018200. Its totient is φ = 1838178018198.

The previous prime is 1838178018197. The next prime is 1838178018221. The reversal of 1838178018199 is 9918108718381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1838178018199 - 2¹ = 1838178018197 is a prime.

Together with 1838178018197, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1838178018199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838178018197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919089009099 + 919089009100.

It is an arithmetic number, because the mean of its divisors is an integer number (919089009100).

Almost surely, 2^{1838178018199} is an apocalyptic number.

1838178018199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838178018199 is an equidigital number, since it uses as much as digits as its factorization.

1838178018199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 64.

The spelling of 1838178018199 in words is "one trillion, eight hundred thirty-eight billion, one hundred seventy-eight million, eighteen thousand, one hundred ninety-nine".