18085008771 has 24 divisors (see below), whose sum is σ = 26237633760. Its totient is φ = 12003780096.

The previous prime is 18085008769. The next prime is 18085008841. The reversal of 18085008771 is 17780058081.

It is not a de Polignac number, because 18085008771 - 2¹ = 18085008769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18085008761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2170305 + ... + 2178621.

It is an arithmetic number, because the mean of its divisors is an integer number (1093234740).

Almost surely, 2^18085008771 is an apocalyptic number.

18085008771 is a deficient number, since it is larger than the sum of its proper divisors (8152624989).

18085008771 is a wasteful number, since it uses less digits than its factorization.

18085008771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9355 (or 9352 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 45.

The spelling of 18085008771 in words is "eighteen billion, eighty-five million, eight thousand, seven hundred seventy-one".