19985938 has 8 divisors (see below), whose sum is σ = 34261632. Its totient is φ = 8565396.

The previous prime is 19985923. The next prime is 19985939. The reversal of 19985938 is 83958991.

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

It is not an unprimeable number, because it can be changed into a prime (19985939) 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, 713770 + ... + 713797.

It is an arithmetic number, because the mean of its divisors is an integer number (4282704).

Almost surely, 2^19985938 is an apocalyptic number.

19985938 is a deficient number, since it is larger than the sum of its proper divisors (14275694).

19985938 is a wasteful number, since it uses less digits than its factorization.

19985938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427576.

The product of its digits is 699840, while the sum is 52.

The square root of 19985938 is about 4470.5634991576. The cubic root of 19985938 is about 271.3781298431.

The spelling of 19985938 in words is "nineteen million, nine hundred eighty-five thousand, nine hundred thirty-eight".