18013751668 has 12 divisors (see below), whose sum is σ = 34389889632. Its totient is φ = 8188068920.

The previous prime is 18013751627. The next prime is 18013751669. The reversal of 18013751668 is 86615731081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18013751669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204701680 + ... + 204701767.

It is an arithmetic number, because the mean of its divisors is an integer number (2865824136).

Almost surely, 2^18013751668 is an apocalyptic number.

It is an amenable number.

18013751668 is a deficient number, since it is larger than the sum of its proper divisors (16376137964).

18013751668 is a wasteful number, since it uses less digits than its factorization.

18013751668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409403462 (or 409403460 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 18013751668 in words is "eighteen billion, thirteen million, seven hundred fifty-one thousand, six hundred sixty-eight".