18494181798 has 32 divisors (see below), whose sum is σ = 37099956096. Its totient is φ = 6146157888.

The previous prime is 18494181737. The next prime is 18494181809. The reversal of 18494181798 is 89718149481.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3162265 + ... + 3168107.

It is an arithmetic number, because the mean of its divisors is an integer number (1159373628).

Almost surely, 2^18494181798 is an apocalyptic number.

18494181798 is an abundant number, since it is smaller than the sum of its proper divisors (18605774298).

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

18494181798 is a wasteful number, since it uses less digits than its factorization.

18494181798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7348.

The product of its digits is 4644864, while the sum is 60.

The spelling of 18494181798 in words is "eighteen billion, four hundred ninety-four million, one hundred eighty-one thousand, seven hundred ninety-eight".