19996042 has 8 divisors (see below), whose sum is σ = 32720832. Its totient is φ = 9089100.

The previous prime is 19996019. The next prime is 19996049. The reversal of 19996042 is 24069991.

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 = 19995986 and 19996004.

It is not an unprimeable number, because it can be changed into a prime (19996049) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 454434 + ... + 454477.

It is an arithmetic number, because the mean of its divisors is an integer number (4090104).

Almost surely, 2^19996042 is an apocalyptic number.

19996042 is a deficient number, since it is larger than the sum of its proper divisors (12724790).

19996042 is a wasteful number, since it uses less digits than its factorization.

19996042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908924.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 19996042 is about 4471.6934152511. The cubic root of 19996042 is about 271.4238543699.

It can be divided in two parts, 199960 and 42, that added together give a palindrome (200002).

The spelling of 19996042 in words is "nineteen million, nine hundred ninety-six thousand, forty-two".