19998344 has 8 divisors (see below), whose sum is σ = 37496910. Its totient is φ = 9999168.

The previous prime is 19998337. The next prime is 19998353. The reversal of 19998344 is 44389991.

It can be written as a sum of positive squares in only one way, i.e., 19695844 + 302500 = 4438^2 + 550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249889 + ... + 1249904.

Almost surely, 2^19998344 is an apocalyptic number.

It is an amenable number.

19998344 is a deficient number, since it is larger than the sum of its proper divisors (17498566).

19998344 is a wasteful number, since it uses less digits than its factorization.

19998344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499799 (or 2499795 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 19998344 is about 4471.9508047384. The cubic root of 19998344 is about 271.4342696601.

The spelling of 19998344 in words is "nineteen million, nine hundred ninety-eight thousand, three hundred forty-four".