18387963489357 has 64 divisors (see below), whose sum is σ = 34685962444800. Its totient is φ = 9348950715840.

The previous prime is 18387963489331. The next prime is 18387963489377. The reversal of 18387963489357 is 75398436978381.

18387963489357 is a `hidden beast` number, since 1 + 8 + 3 + 8 + 79 + 63 + 489 + 3 + 5 + 7 = 666.

It is not a de Polignac number, because 18387963489357 - 2²⁰ = 18387962440781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18387963489377) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 93993982 + ... + 94189407.

It is an arithmetic number, because the mean of its divisors is an integer number (541968163200).

Almost surely, 2^{18387963489357} is an apocalyptic number.

It is an amenable number.

18387963489357 is a deficient number, since it is larger than the sum of its proper divisors (16297998955443).

18387963489357 is a wasteful number, since it uses less digits than its factorization.

18387963489357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188183463 (or 188183457 counting only the distinct ones).

The product of its digits is 6584094720, while the sum is 81.

The spelling of 18387963489357 in words is "eighteen trillion, three hundred eighty-seven billion, nine hundred sixty-three million, four hundred eighty-nine thousand, three hundred fifty-seven".