19988368 has 10 divisors (see below), whose sum is σ = 38727494. Its totient is φ = 9994176.

The previous prime is 19988363. The next prime is 19988369. The reversal of 19988368 is 86388991.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 345744 = 4432^2 + 588^2 .

It is not an unprimeable number, because it can be changed into a prime (19988363) by changing a digit.

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 as a sum of consecutive naturals, namely, 624621 + ... + 624652.

Almost surely, 2^19988368 is an apocalyptic number.

It is an amenable number.

19988368 is a deficient number, since it is larger than the sum of its proper divisors (18739126).

19988368 is a wasteful number, since it uses less digits than its factorization.

19988368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249281 (or 1249275 counting only the distinct ones).

The product of its digits is 746496, while the sum is 52.

The square root of 19988368 is about 4470.8352687166. The cubic root of 19988368 is about 271.3891279447.

The spelling of 19988368 in words is "nineteen million, nine hundred eighty-eight thousand, three hundred sixty-eight".