18006630985 has 24 divisors (see below), whose sum is σ = 25216716096. Its totient is φ = 12307649760.

The previous prime is 18006630959. The next prime is 18006631001. The reversal of 18006630985 is 58903660081.

It is not a de Polignac number, because 18006630985 - 2⁷ = 18006630857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41967 + ... + 194356.

It is an arithmetic number, because the mean of its divisors is an integer number (1050696504).

Almost surely, 2^18006630985 is an apocalyptic number.

It is an amenable number.

18006630985 is a deficient number, since it is larger than the sum of its proper divisors (7210085111).

18006630985 is a wasteful number, since it uses less digits than its factorization.

18006630985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236653 (or 236646 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 18006630985 in words is "eighteen billion, six million, six hundred thirty thousand, nine hundred eighty-five".