19784042 has 8 divisors (see below), whose sum is σ = 30366336. Its totient is φ = 9661932.

The previous prime is 19784029. The next prime is 19784081. The reversal of 19784042 is 24048791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 19783993 and 19784011.

It is an unprimeable number.

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, 114938 + ... + 115109.

It is an arithmetic number, because the mean of its divisors is an integer number (3795792).

Almost surely, 2^19784042 is an apocalyptic number.

19784042 is a deficient number, since it is larger than the sum of its proper divisors (10582294).

19784042 is a wasteful number, since it uses less digits than its factorization.

19784042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230092.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 19784042 is about 4447.9255839099. The cubic root of 19784042 is about 270.4612235614.

The spelling of 19784042 in words is "nineteen million, seven hundred eighty-four thousand, forty-two".