18520169066 has 64 divisors (see below), whose sum is σ = 34156684800. Its totient is φ = 7513228800.

The previous prime is 18520169039. The next prime is 18520169137. The reversal of 18520169066 is 66096102581.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1524416 + ... + 1536516.

It is an arithmetic number, because the mean of its divisors is an integer number (533698200).

Almost surely, 2^18520169066 is an apocalyptic number.

18520169066 is a deficient number, since it is larger than the sum of its proper divisors (15636515734).

18520169066 is a wasteful number, since it uses less digits than its factorization.

18520169066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12244 (or 12230 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 18520169066 in words is "eighteen billion, five hundred twenty million, one hundred sixty-nine thousand, sixty-six".