18368516837 has 16 divisors (see below), whose sum is σ = 20593872000. Its totient is φ = 16236354240.

The previous prime is 18368516833. The next prime is 18368516839. The reversal of 18368516837 is 73861586381.

It is a cyclic number.

It is not a de Polignac number, because 18368516837 - 2² = 18368516833 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18368516833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620039 + ... + 648987.

It is an arithmetic number, because the mean of its divisors is an integer number (1287117000).

Almost surely, 2^18368516837 is an apocalyptic number.

It is an amenable number.

18368516837 is a deficient number, since it is larger than the sum of its proper divisors (2225355163).

18368516837 is a wasteful number, since it uses less digits than its factorization.

18368516837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30556.

The product of its digits is 5806080, while the sum is 56.

The spelling of 18368516837 in words is "eighteen billion, three hundred sixty-eight million, five hundred sixteen thousand, eight hundred thirty-seven".