18585891085 has 8 divisors (see below), whose sum is σ = 22363842816. Its totient is φ = 14828197200.

The previous prime is 18585891043. The next prime is 18585891089. The reversal of 18585891085 is 58019858581.

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

It is not a de Polignac number, because 18585891085 - 2¹¹ = 18585889037 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 (18585891089) 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, 5062441 + ... + 5066110.

It is an arithmetic number, because the mean of its divisors is an integer number (2795480352).

Almost surely, 2^18585891085 is an apocalyptic number.

It is an amenable number.

18585891085 is a deficient number, since it is larger than the sum of its proper divisors (3777951731).

18585891085 is a wasteful number, since it uses less digits than its factorization.

18585891085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10128923.

The product of its (nonzero) digits is 4608000, while the sum is 58.

The spelling of 18585891085 in words is "eighteen billion, five hundred eighty-five million, eight hundred ninety-one thousand, eighty-five".