19887748 has 12 divisors (see below), whose sum is σ = 34865152. Its totient is φ = 9926280.

The previous prime is 19887743. The next prime is 19887799. The reversal of 19887748 is 84778891.

It is a junction number, because it is equal to n+sod(n) for n = 19887695 and 19887704.

It is not an unprimeable number, because it can be changed into a prime (19887743) 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 3 ways as a sum of consecutive naturals, for example, 1668 + ... + 6523.

Almost surely, 2^19887748 is an apocalyptic number.

It is an amenable number.

19887748 is a deficient number, since it is larger than the sum of its proper divisors (14977404).

19887748 is a wasteful number, since it uses less digits than its factorization.

19887748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8802 (or 8800 counting only the distinct ones).

The product of its digits is 903168, while the sum is 52.

The square root of 19887748 is about 4459.5681405266. The cubic root of 19887748 is about 270.9329772573.

The spelling of 19887748 in words is "nineteen million, eight hundred eighty-seven thousand, seven hundred forty-eight".