18307387487 has 18 divisors (see below), whose sum is σ = 19381557048. Its totient is φ = 17260036288.

The previous prime is 18307387481. The next prime is 18307387537. The reversal of 18307387487 is 78478370381.

It is not a de Polignac number, because 18307387487 - 2¹⁶ = 18307321951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18307387481) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 57751853 + ... + 57752169.

Almost surely, 2^18307387487 is an apocalyptic number.

18307387487 is a deficient number, since it is larger than the sum of its proper divisors (1074169561).

18307387487 is an frugal number, since it uses more digits than its factorization.

18307387487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 18307387487 in words is "eighteen billion, three hundred seven million, three hundred eighty-seven thousand, four hundred eighty-seven".