18291998536813 has 8 divisors (see below), whose sum is σ = 18327215983328. Its totient is φ = 18256802115024.

The previous prime is 18291998536781. The next prime is 18291998536817. The reversal of 18291998536813 is 31863589919281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18291998536813 - 2⁵ = 18291998536781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18291998536817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3513906 + ... + 6995107.

It is an arithmetic number, because the mean of its divisors is an integer number (2290901997916).

Almost surely, 2^{18291998536813} is an apocalyptic number.

It is an amenable number.

18291998536813 is a deficient number, since it is larger than the sum of its proper divisors (35217446515).

18291998536813 is a wasteful number, since it uses less digits than its factorization.

18291998536813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10512363.

The product of its digits is 201553920, while the sum is 73.

The spelling of 18291998536813 in words is "eighteen trillion, two hundred ninety-one billion, nine hundred ninety-eight million, five hundred thirty-six thousand, eight hundred thirteen".