19998136 has 16 divisors (see below), whose sum is σ = 37548000. Its totient is φ = 9985344.

The previous prime is 19998047. The next prime is 19998149. The reversal of 19998136 is 63189991.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 7201 + ... + 9583.

It is an arithmetic number, because the mean of its divisors is an integer number (2346750).

Almost surely, 2^19998136 is an apocalyptic number.

It is an amenable number.

19998136 is a deficient number, since it is larger than the sum of its proper divisors (17549864).

19998136 is a wasteful number, since it uses less digits than its factorization.

19998136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438 (or 3434 counting only the distinct ones).

The product of its digits is 104976, while the sum is 46.

The square root of 19998136 is about 4471.9275486081. The cubic root of 19998136 is about 271.4333286068.

The spelling of 19998136 in words is "nineteen million, nine hundred ninety-eight thousand, one hundred thirty-six".