18038145868 has 24 divisors (see below), whose sum is σ = 33436649232. Its totient is φ = 8485231104.

The previous prime is 18038145833. The next prime is 18038145869. The reversal of 18038145868 is 86854183081.

It is not an unprimeable number, because it can be changed into a prime (18038145869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128671 + ... + 229417.

It is an arithmetic number, because the mean of its divisors is an integer number (1393193718).

Almost surely, 2^18038145868 is an apocalyptic number.

It is an amenable number.

18038145868 is a deficient number, since it is larger than the sum of its proper divisors (15398503364).

18038145868 is a wasteful number, since it uses less digits than its factorization.

18038145868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103401 (or 103399 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 52.

The spelling of 18038145868 in words is "eighteen billion, thirty-eight million, one hundred forty-five thousand, eight hundred sixty-eight".