18966903728 has 80 divisors (see below), whose sum is σ = 38518263840. Its totient is φ = 9039513600.

The previous prime is 18966903707. The next prime is 18966903803. The reversal of 18966903728 is 82730966981.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6281003 + ... + 6284021.

It is an arithmetic number, because the mean of its divisors is an integer number (481478298).

Almost surely, 2^18966903728 is an apocalyptic number.

It is an amenable number.

18966903728 is an abundant number, since it is smaller than the sum of its proper divisors (19551360112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18966903728 is a wasteful number, since it uses less digits than its factorization.

18966903728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286 (or 3280 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 18966903728 in words is "eighteen billion, nine hundred sixty-six million, nine hundred three thousand, seven hundred twenty-eight".