19875880 has 16 divisors (see below), whose sum is σ = 44720820. Its totient is φ = 7950336.

The previous prime is 19875871. The next prime is 19875913. The reversal of 19875880 is 8857891.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 2116 = 4458^2 + 46^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19875880.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248409 + ... + 248488.

Almost surely, 2^19875880 is an apocalyptic number.

19875880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19875880 is an abundant number, since it is smaller than the sum of its proper divisors (24844940).

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

19875880 is a wasteful number, since it uses less digits than its factorization.

19875880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496908 (or 496904 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 19875880 is about 4458.2373198384. The cubic root of 19875880 is about 270.8790735107.

The spelling of 19875880 in words is "nineteen million, eight hundred seventy-five thousand, eight hundred eighty".