18143838066 has 32 divisors (see below), whose sum is σ = 36541189440. Its totient is φ = 6005841984.

The previous prime is 18143838059. The next prime is 18143838077. The reversal of 18143838066 is 66083834181.

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, 479280 + ... + 515748.

It is an arithmetic number, because the mean of its divisors is an integer number (1141912170).

Almost surely, 2^18143838066 is an apocalyptic number.

18143838066 is an abundant number, since it is smaller than the sum of its proper divisors (18397351374).

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

18143838066 is a wasteful number, since it uses less digits than its factorization.

18143838066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37050.

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 18143838066 in words is "eighteen billion, one hundred forty-three million, eight hundred thirty-eight thousand, sixty-six".