19980116 has 24 divisors (see below), whose sum is σ = 37889544. Its totient is φ = 9164160.

The previous prime is 19980113. The next prime is 19980119. The reversal of 19980116 is 61108991.

It is an interprime number because it is at equal distance from previous prime (19980113) and next prime (19980119).

It can be written as a sum of positive squares in 4 ways, for example, as 5080516 + 14899600 = 2254^2 + 3860^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19980113) 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 in 7 ways as a sum of consecutive naturals, for example, 7886 + ... + 10106.

It is an arithmetic number, because the mean of its divisors is an integer number (1578731).

Almost surely, 2^19980116 is an apocalyptic number.

It is an amenable number.

19980116 is a deficient number, since it is larger than the sum of its proper divisors (17909428).

19980116 is a wasteful number, since it uses less digits than its factorization.

19980116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411 (or 2409 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 19980116 is about 4469.9123033903. The cubic root of 19980116 is about 271.3517760318.

The spelling of 19980116 in words is "nineteen million, nine hundred eighty thousand, one hundred sixteen".