18618043787472 has 40 divisors (see below), whose sum is σ = 48103036347520. Its totient is φ = 6205185792000.

The previous prime is 18618043787467. The next prime is 18618043787621. The reversal of 18618043787472 is 27478734081681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25536904 + ... + 26255847.

It is an arithmetic number, because the mean of its divisors is an integer number (1202575908688).

Almost surely, 2^{18618043787472} is an apocalyptic number.

18618043787472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18618043787472 is an abundant number, since it is smaller than the sum of its proper divisors (29484992560048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18618043787472 is a wasteful number, since it uses less digits than its factorization.

18618043787472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51800251 (or 51800245 counting only the distinct ones).

The product of its (nonzero) digits is 101154816, while the sum is 66.

The spelling of 18618043787472 in words is "eighteen trillion, six hundred eighteen billion, forty-three million, seven hundred eighty-seven thousand, four hundred seventy-two".