18587645012 has 24 divisors (see below), whose sum is σ = 34128148992. Its totient is φ = 8846575200.

The previous prime is 18587645009. The next prime is 18587645039. The reversal of 18587645012 is 21054678581.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1221128 + ... + 1236255.

It is an arithmetic number, because the mean of its divisors is an integer number (1422006208).

Almost surely, 2^18587645012 is an apocalyptic number.

It is an amenable number.

18587645012 is a deficient number, since it is larger than the sum of its proper divisors (15540503980).

18587645012 is a wasteful number, since it uses less digits than its factorization.

18587645012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457479 (or 2457477 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 47.

The spelling of 18587645012 in words is "eighteen billion, five hundred eighty-seven million, six hundred forty-five thousand, twelve".