18986476 has 12 divisors (see below), whose sum is σ = 34124608. Its totient is φ = 9236592.

The previous prime is 18986447. The next prime is 18986483. The reversal of 18986476 is 67468981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63996 + ... + 64291.

Almost surely, 2^18986476 is an apocalyptic number.

It is an amenable number.

18986476 is a deficient number, since it is larger than the sum of its proper divisors (15138132).

18986476 is a wasteful number, since it uses less digits than its factorization.

18986476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128328 (or 128326 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 18986476 is about 4357.3473581986. The cubic root of 18986476 is about 266.7768385046.

The spelling of 18986476 in words is "eighteen million, nine hundred eighty-six thousand, four hundred seventy-six".