18835804066 has 8 divisors (see below), whose sum is σ = 28295441820. Its totient is φ = 9403990128.

The previous prime is 18835804063. The next prime is 18835804067. The reversal of 18835804066 is 66040853881.

It can be written as a sum of positive squares in 2 ways, for example, as 15183414841 + 3652389225 = 123221^2 + 60435^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18835804061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6954261 + ... + 6956968.

Almost surely, 2^18835804066 is an apocalyptic number.

18835804066 is a deficient number, since it is larger than the sum of its proper divisors (9459637754).

18835804066 is a wasteful number, since it uses less digits than its factorization.

18835804066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13911908.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 18835804066 in words is "eighteen billion, eight hundred thirty-five million, eight hundred four thousand, sixty-six".