18537038065 has 32 divisors (see below), whose sum is σ = 27396262656. Its totient is φ = 11725413120.

The previous prime is 18537038059. The next prime is 18537038081. The reversal of 18537038065 is 56083073581.

It is not a de Polignac number, because 18537038065 - 2⁵ = 18537038033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 701839 + ... + 727771.

It is an arithmetic number, because the mean of its divisors is an integer number (856133208).

Almost surely, 2^18537038065 is an apocalyptic number.

It is an amenable number.

18537038065 is a deficient number, since it is larger than the sum of its proper divisors (8859224591).

18537038065 is a wasteful number, since it uses less digits than its factorization.

18537038065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27529.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 18537038065 in words is "eighteen billion, five hundred thirty-seven million, thirty-eight thousand, sixty-five".