18821544488137 has 8 divisors (see below), whose sum is σ = 19483181951040. Its totient is φ = 18160748271120.

The previous prime is 18821544488063. The next prime is 18821544488161. The reversal of 18821544488137 is 73188444512881.

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 18821544488137 - 2⁷ = 18821544488009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18821544888137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210265939 + ... + 210355432.

It is an arithmetic number, because the mean of its divisors is an integer number (2435397743880).

Almost surely, 2^{18821544488137} is an apocalyptic number.

It is an amenable number.

18821544488137 is a deficient number, since it is larger than the sum of its proper divisors (661637462903).

18821544488137 is a wasteful number, since it uses less digits than its factorization.

18821544488137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420622943.

The product of its digits is 55050240, while the sum is 64.

The spelling of 18821544488137 in words is "eighteen trillion, eight hundred twenty-one billion, five hundred forty-four million, four hundred eighty-eight thousand, one hundred thirty-seven".