18366868333538 has 16 divisors (see below), whose sum is σ = 27983327717760. Its totient is φ = 9039794821200.

The previous prime is 18366868333537. The next prime is 18366868333601. The reversal of 18366868333538 is 83533386866381.

It is not an unprimeable number, because it can be changed into a prime (18366868333537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175545893 + ... + 175650488.

It is an arithmetic number, because the mean of its divisors is an integer number (1748957982360).

Almost surely, 2^{18366868333538} is an apocalyptic number.

18366868333538 is a deficient number, since it is larger than the sum of its proper divisors (9616459384222).

18366868333538 is a wasteful number, since it uses less digits than its factorization.

18366868333538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351196793.

The product of its digits is 1074954240, while the sum is 71.

The spelling of 18366868333538 in words is "eighteen trillion, three hundred sixty-six billion, eight hundred sixty-eight million, three hundred thirty-three thousand, five hundred thirty-eight".