19987714 has 4 divisors (see below), whose sum is σ = 29981574. Its totient is φ = 9993856.

The previous prime is 19987697. The next prime is 19987727. The reversal of 19987714 is 41778991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 9715689 = 3205^2 + 3117^2 .

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 as a sum of consecutive naturals, namely, 4996927 + ... + 4996930.

Almost surely, 2^19987714 is an apocalyptic number.

19987714 is a deficient number, since it is larger than the sum of its proper divisors (9993860).

19987714 is an equidigital number, since it uses as much as digits as its factorization.

19987714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9993859.

The product of its digits is 127008, while the sum is 46.

The square root of 19987714 is about 4470.7621274230. The cubic root of 19987714 is about 271.3861680495.

The spelling of 19987714 in words is "nineteen million, nine hundred eighty-seven thousand, seven hundred fourteen".