18966527985 has 32 divisors (see below), whose sum is σ = 32086978560. Its totient is φ = 9540082368.

The previous prime is 18966527971. The next prime is 18966528017. The reversal of 18966527985 is 58972566981.

It is not a de Polignac number, because 18966527985 - 2⁹ = 18966527473 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, 85659 + ... + 212768.

It is an arithmetic number, because the mean of its divisors is an integer number (1002718080).

Almost surely, 2^18966527985 is an apocalyptic number.

18966527985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18966527985 is a deficient number, since it is larger than the sum of its proper divisors (13120450575).

18966527985 is a wasteful number, since it uses less digits than its factorization.

18966527985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298677.

The product of its digits is 65318400, while the sum is 66.

The spelling of 18966527985 in words is "eighteen billion, nine hundred sixty-six million, five hundred twenty-seven thousand, nine hundred eighty-five".