18518335352037 has 6 divisors (see below), whose sum is σ = 26748706619622. Its totient is φ = 12345556901352.

The previous prime is 18518335352021. The next prime is 18518335352039. The reversal of 18518335352037 is 73025353381581.

18518335352037 is a `hidden beast` number, since 1 + 8 + 5 + 1 + 8 + 33 + 53 + 520 + 37 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16863186203361 + 1655149148676 = 4106481^2 + 1286526^2 .

It is not a de Polignac number, because 18518335352037 - 2⁴ = 18518335352021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518335352039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1028796408438 + ... + 1028796408455.

It is an arithmetic number, because the mean of its divisors is an integer number (4458117769937).

Almost surely, 2^{18518335352037} is an apocalyptic number.

It is an amenable number.

18518335352037 is a deficient number, since it is larger than the sum of its proper divisors (8230371267585).

18518335352037 is a wasteful number, since it uses less digits than its factorization.

18518335352037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057592816899 (or 2057592816896 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 18518335352037 in words is "eighteen trillion, five hundred eighteen billion, three hundred thirty-five million, three hundred fifty-two thousand, thirty-seven".