18742856084487 has 8 divisors (see below), whose sum is σ = 27767194199280. Its totient is φ = 12495237389640.

The previous prime is 18742856084461. The next prime is 18742856084503. The reversal of 18742856084487 is 78448065824781.

18742856084487 is a `hidden beast` number, since 1 + 8 + 7 + 4 + 2 + 8 + 5 + 60 + 84 + 487 = 666.

It is not a de Polignac number, because 18742856084487 - 2¹⁴ = 18742856068103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18742856083487) 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, 347089927464 + ... + 347089927517.

It is an arithmetic number, because the mean of its divisors is an integer number (3470899274910).

Almost surely, 2^{18742856084487} is an apocalyptic number.

18742856084487 is a deficient number, since it is larger than the sum of its proper divisors (9024338114793).

18742856084487 is an equidigital number, since it uses as much as digits as its factorization.

18742856084487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694179854990 (or 694179854984 counting only the distinct ones).

The product of its (nonzero) digits is 770703360, while the sum is 72.

The spelling of 18742856084487 in words is "eighteen trillion, seven hundred forty-two billion, eight hundred fifty-six million, eighty-four thousand, four hundred eighty-seven".