18585738872 has 16 divisors (see below), whose sum is σ = 34861811400. Its totient is φ = 9289255840.

The previous prime is 18585738859. The next prime is 18585738881. The reversal of 18585738872 is 27883758581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429779 + ... + 471042.

Almost surely, 2^18585738872 is an apocalyptic number.

It is an amenable number.

18585738872 is a deficient number, since it is larger than the sum of its proper divisors (16276072528).

18585738872 is a wasteful number, since it uses less digits than its factorization.

18585738872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903406 (or 903402 counting only the distinct ones).

The product of its digits is 30105600, while the sum is 62.

The spelling of 18585738872 in words is "eighteen billion, five hundred eighty-five million, seven hundred thirty-eight thousand, eight hundred seventy-two".