18103286591 has 32 divisors (see below), whose sum is σ = 20563200000. Its totient is φ = 15906674784.

The previous prime is 18103286567. The next prime is 18103286603. The reversal of 18103286591 is 19568230181.

It is a de Polignac number, because none of the positive numbers 2^k-18103286591 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 (18103286521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12076160 + ... + 12077658.

It is an arithmetic number, because the mean of its divisors is an integer number (642600000).

Almost surely, 2^18103286591 is an apocalyptic number.

18103286591 is a deficient number, since it is larger than the sum of its proper divisors (2459913409).

18103286591 is a wasteful number, since it uses less digits than its factorization.

18103286591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 18103286591 in words is "eighteen billion, one hundred three million, two hundred eighty-six thousand, five hundred ninety-one".