19988700 has 36 divisors (see below), whose sum is σ = 57834840. Its totient is φ = 5330240.

The previous prime is 19988699. The next prime is 19988737. The reversal of 19988700 is 788991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33015 + ... + 33614.

Almost surely, 2^19988700 is an apocalyptic number.

19988700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19988700 is an abundant number, since it is smaller than the sum of its proper divisors (37846140).

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

19988700 is a wasteful number, since it uses less digits than its factorization.

19988700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66646 (or 66639 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 19988700 is about 4470.8723980897. The cubic root of 19988700 is about 271.3906304968.

The spelling of 19988700 in words is "nineteen million, nine hundred eighty-eight thousand, seven hundred".