18644654746873 has 8 divisors (see below), whose sum is σ = 19112246737920. Its totient is φ = 18177674389920.

The previous prime is 18644654746871. The next prime is 18644654746889. The reversal of 18644654746873 is 37864745644681.

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 18644654746873 - 2¹ = 18644654746871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18644654746796 and 18644654746805.

It is not an unprimeable number, because it can be changed into a prime (18644654746871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152846793 + ... + 152968726.

It is an arithmetic number, because the mean of its divisors is an integer number (2389030842240).

Almost surely, 2^{18644654746873} is an apocalyptic number.

It is an amenable number.

18644654746873 is a deficient number, since it is larger than the sum of its proper divisors (467591991047).

18644654746873 is a wasteful number, since it uses less digits than its factorization.

18644654746873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305817047.

The product of its digits is 2601123840, while the sum is 73.

The spelling of 18644654746873 in words is "eighteen trillion, six hundred forty-four billion, six hundred fifty-four million, seven hundred forty-six thousand, eight hundred seventy-three".