18516850185187 has 8 divisors (see below), whose sum is σ = 18838409586480. Its totient is φ = 18195547933440.

The previous prime is 18516850185131. The next prime is 18516850185193. The reversal of 18516850185187 is 78158105861581.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18516850185187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18516850185107) 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, 64142118 + ... + 64430155.

It is an arithmetic number, because the mean of its divisors is an integer number (2354801198310).

Almost surely, 2^{18516850185187} is an apocalyptic number.

18516850185187 is a deficient number, since it is larger than the sum of its proper divisors (321559401293).

18516850185187 is a wasteful number, since it uses less digits than its factorization.

18516850185187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128574773.

The product of its (nonzero) digits is 21504000, while the sum is 64.

The spelling of 18516850185187 in words is "eighteen trillion, five hundred sixteen billion, eight hundred fifty million, one hundred eighty-five thousand, one hundred eighty-seven".