18649542985 has 8 divisors (see below), whose sum is σ = 23352471360. Its totient is φ = 14270954544.

The previous prime is 18649542983. The next prime is 18649543013. The reversal of 18649542985 is 58924594681.

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 18649542985 - 2¹ = 18649542983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18649542983) 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 7 ways as a sum of consecutive naturals, for example, 81084855 + ... + 81085084.

It is an arithmetic number, because the mean of its divisors is an integer number (2919058920).

Almost surely, 2^18649542985 is an apocalyptic number.

It is an amenable number.

18649542985 is a deficient number, since it is larger than the sum of its proper divisors (4702928375).

18649542985 is a wasteful number, since it uses less digits than its factorization.

18649542985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162169967.

The product of its digits is 24883200, while the sum is 61.

The spelling of 18649542985 in words is "eighteen billion, six hundred forty-nine million, five hundred forty-two thousand, nine hundred eighty-five".