18987682 has 16 divisors (see below), whose sum is σ = 33308352. Its totient is φ = 7948080.

The previous prime is 18987677. The next prime is 18987739. The reversal of 18987682 is 28678981.

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 7 ways as a sum of consecutive naturals, for example, 15169 + ... + 16372.

It is an arithmetic number, because the mean of its divisors is an integer number (2081772).

Almost surely, 2^18987682 is an apocalyptic number.

18987682 is a deficient number, since it is larger than the sum of its proper divisors (14320670).

18987682 is a wasteful number, since it uses less digits than its factorization.

18987682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31593.

The product of its digits is 387072, while the sum is 49.

The square root of 18987682 is about 4357.4857429486. The cubic root of 18987682 is about 266.7824868418.

The spelling of 18987682 in words is "eighteen million, nine hundred eighty-seven thousand, six hundred eighty-two".