19868120 has 16 divisors (see below), whose sum is σ = 44703360. Its totient is φ = 7947232.

The previous prime is 19868111. The next prime is 19868141. The reversal of 19868120 is 2186891.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 248312 + ... + 248391.

It is an arithmetic number, because the mean of its divisors is an integer number (2793960).

Almost surely, 2^19868120 is an apocalyptic number.

19868120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19868120 is an abundant number, since it is smaller than the sum of its proper divisors (24835240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19868120 is a wasteful number, since it uses less digits than its factorization.

19868120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496714 (or 496710 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 19868120 is about 4457.3669357593. The cubic root of 19868120 is about 270.8438164516.

The spelling of 19868120 in words is "nineteen million, eight hundred sixty-eight thousand, one hundred twenty".