18714987 has 12 divisors (see below), whose sum is σ = 27186120. Its totient is φ = 12405888.

The previous prime is 18714959. The next prime is 18715003. The reversal of 18714987 is 78941781.

It is not a de Polignac number, because 18714987 - 2¹⁰ = 18713963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18714587) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4198 + ... + 7419.

It is an arithmetic number, because the mean of its divisors is an integer number (2265510).

Almost surely, 2^18714987 is an apocalyptic number.

18714987 is a deficient number, since it is larger than the sum of its proper divisors (8471133).

18714987 is a wasteful number, since it uses less digits than its factorization.

18714987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11802 (or 11799 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 18714987 is about 4326.0821767507. The cubic root of 18714987 is about 265.4991754153.

It can be divided in two parts, 18714 and 987, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 18714987 in words is "eighteen million, seven hundred fourteen thousand, nine hundred eighty-seven".