18986672 has 20 divisors (see below), whose sum is σ = 37412040. Its totient is φ = 9331968.

The previous prime is 18986651. The next prime is 18986689. The reversal of 18986672 is 27668981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9113 + ... + 11000.

It is an arithmetic number, because the mean of its divisors is an integer number (1870602).

Almost surely, 2^18986672 is an apocalyptic number.

It is an amenable number.

18986672 is a deficient number, since it is larger than the sum of its proper divisors (18425368).

18986672 is a wasteful number, since it uses less digits than its factorization.

18986672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20180 (or 20174 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 18986672 is about 4357.3698488882. The cubic root of 18986672 is about 266.7777564928. Note that the first 4 decimals are identical.

The spelling of 18986672 in words is "eighteen million, nine hundred eighty-six thousand, six hundred seventy-two".