19980568 has 8 divisors (see below), whose sum is σ = 37463580. Its totient is φ = 9990280.

The previous prime is 19980563. The next prime is 19980637. The reversal of 19980568 is 86508991.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19980563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248778 + ... + 1248793.

Almost surely, 2^19980568 is an apocalyptic number.

It is an amenable number.

19980568 is a deficient number, since it is larger than the sum of its proper divisors (17483012).

19980568 is a wasteful number, since it uses less digits than its factorization.

19980568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497577 (or 2497573 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 19980568 is about 4469.9628633804. The cubic root of 19980568 is about 271.3538222341.

The spelling of 19980568 in words is "nineteen million, nine hundred eighty thousand, five hundred sixty-eight".