18518537056 has 12 divisors (see below), whose sum is σ = 36458369892. Its totient is φ = 9259268512.

The previous prime is 18518537003. The next prime is 18518537071. The reversal of 18518537056 is 65073581581.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 289352110 + ... + 289352173.

It is an arithmetic number, because the mean of its divisors is an integer number (3038197491).

Almost surely, 2^18518537056 is an apocalyptic number.

18518537056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18518537056 is a deficient number, since it is larger than the sum of its proper divisors (17939832836).

18518537056 is an equidigital number, since it uses as much as digits as its factorization.

18518537056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578704293 (or 578704285 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 49.

The spelling of 18518537056 in words is "eighteen billion, five hundred eighteen million, five hundred thirty-seven thousand, fifty-six".