18411191238 has 64 divisors (see below), whose sum is σ = 40492553472. Its totient is φ = 5534455680.

The previous prime is 18411191237. The next prime is 18411191257. The reversal of 18411191238 is 83219111481.

It is a junction number, because it is equal to n+sod(n) for n = 18411191196 and 18411191205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18411191237) 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 in 31 ways as a sum of consecutive naturals, for example, 8837745 + ... + 8839827.

It is an arithmetic number, because the mean of its divisors is an integer number (632696148).

Almost surely, 2^18411191238 is an apocalyptic number.

18411191238 is an abundant number, since it is smaller than the sum of its proper divisors (22081362234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18411191238 is a wasteful number, since it uses less digits than its factorization.

18411191238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109.

The product of its digits is 13824, while the sum is 39.

The spelling of 18411191238 in words is "eighteen billion, four hundred eleven million, one hundred ninety-one thousand, two hundred thirty-eight".