19938680 has 16 divisors (see below), whose sum is σ = 44862120. Its totient is φ = 7975456.

The previous prime is 19938679. The next prime is 19938683. The reversal of 19938680 is 8683991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19938683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249194 + ... + 249273.

Almost surely, 2^19938680 is an apocalyptic number.

19938680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19938680 is an abundant number, since it is smaller than the sum of its proper divisors (24923440).

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

19938680 is a wasteful number, since it uses less digits than its factorization.

19938680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498478 (or 498474 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 19938680 is about 4465.2749075505. The cubic root of 19938680 is about 271.1640641786.

The spelling of 19938680 in words is "nineteen million, nine hundred thirty-eight thousand, six hundred eighty".