18498461587 has 16 divisors (see below), whose sum is σ = 18840276000. Its totient is φ = 18160113664.

The previous prime is 18498461567. The next prime is 18498461591. The reversal of 18498461587 is 78516489481.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18498461587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18498461557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8687739 + ... + 8689867.

It is an arithmetic number, because the mean of its divisors is an integer number (1177517250).

Almost surely, 2^18498461587 is an apocalyptic number.

18498461587 is a deficient number, since it is larger than the sum of its proper divisors (341814413).

18498461587 is a wasteful number, since it uses less digits than its factorization.

18498461587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870.

The product of its digits is 15482880, while the sum is 61.

The spelling of 18498461587 in words is "eighteen billion, four hundred ninety-eight million, four hundred sixty-one thousand, five hundred eighty-seven".