18618043787473 has 8 divisors (see below), whose sum is σ = 20056833595008. Its totient is φ = 17180201493264.

The previous prime is 18618043787467. The next prime is 18618043787621. The reversal of 18618043787473 is 37478734081681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18618043787473 - 2³⁷ = 18480604834001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18618043787399 and 18618043787408.

It is not an unprimeable number, because it can be changed into a prime (18618047787473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236837515 + ... + 236916112.

It is an arithmetic number, because the mean of its divisors is an integer number (2507104199376).

Almost surely, 2^{18618043787473} is an apocalyptic number.

18618043787473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18618043787473 is a deficient number, since it is larger than the sum of its proper divisors (1438789807535).

18618043787473 is a wasteful number, since it uses less digits than its factorization.

18618043787473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473756663.

The product of its (nonzero) digits is 151732224, while the sum is 67.

The spelling of 18618043787473 in words is "eighteen trillion, six hundred eighteen billion, forty-three million, seven hundred eighty-seven thousand, four hundred seventy-three".