18966528009 has 24 divisors (see below), whose sum is σ = 32185625472. Its totient is φ = 10610644320.

The previous prime is 18966527971. The next prime is 18966528017. The reversal of 18966528009 is 90082566981.

It is a happy number.

It is not a de Polignac number, because 18966528009 - 2⁸ = 18966527753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18966528109) 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, 7367217 + ... + 7369790.

It is an arithmetic number, because the mean of its divisors is an integer number (1341067728).

Almost surely, 2^18966528009 is an apocalyptic number.

It is an amenable number.

18966528009 is a deficient number, since it is larger than the sum of its proper divisors (13219097463).

18966528009 is a wasteful number, since it uses less digits than its factorization.

18966528009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14737037 (or 14737034 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 18966528009 in words is "eighteen billion, nine hundred sixty-six million, five hundred twenty-eight thousand, nine".