18348492891 has 16 divisors (see below), whose sum is σ = 25039815680. Its totient is φ = 11944890720.

The previous prime is 18348492863. The next prime is 18348492893. The reversal of 18348492891 is 19829484381.

It is not a de Polignac number, because 18348492891 - 2¹¹ = 18348490843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18348492893) 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 15 ways as a sum of consecutive naturals, for example, 583101 + ... + 613761.

It is an arithmetic number, because the mean of its divisors is an integer number (1564988480).

Almost surely, 2^18348492891 is an apocalyptic number.

18348492891 is a deficient number, since it is larger than the sum of its proper divisors (6691322789).

18348492891 is a wasteful number, since it uses less digits than its factorization.

18348492891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35346.

The product of its digits is 3981312, while the sum is 57.

The spelling of 18348492891 in words is "eighteen billion, three hundred forty-eight million, four hundred ninety-two thousand, eight hundred ninety-one".