18618043787466 has 8 divisors (see below), whose sum is σ = 37236087574944. Its totient is φ = 6206014595820.

The previous prime is 18618043787449. The next prime is 18618043787467. The reversal of 18618043787466 is 66478734081681.

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

18618043787466 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18618043787466.

It is not an unprimeable number, because it can be changed into a prime (18618043787467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1551503648950 + ... + 1551503648961.

It is an arithmetic number, because the mean of its divisors is an integer number (4654510946868).

Almost surely, 2^{18618043787466} is an apocalyptic number.

18618043787466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18618043787466 is a wasteful number, since it uses less digits than its factorization.

18618043787466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103007297916.

The product of its (nonzero) digits is 260112384, while the sum is 69.

The spelling of 18618043787466 in words is "eighteen trillion, six hundred eighteen billion, forty-three million, seven hundred eighty-seven thousand, four hundred sixty-six".