18032489985 has 32 divisors (see below), whose sum is σ = 30618311040. Its totient is φ = 9031113728.

The previous prime is 18032489903. The next prime is 18032490001. The reversal of 18032489985 is 58998423081.

It is a happy number.

It is not a de Polignac number, because 18032489985 - 2¹⁴ = 18032473601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33151 + ... + 192779.

It is an arithmetic number, because the mean of its divisors is an integer number (956822220).

Almost surely, 2^18032489985 is an apocalyptic number.

18032489985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18032489985 is a deficient number, since it is larger than the sum of its proper divisors (12585821055).

18032489985 is a wasteful number, since it uses less digits than its factorization.

18032489985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160097.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 18032489985 in words is "eighteen billion, thirty-two million, four hundred eighty-nine thousand, nine hundred eighty-five".