19713798 has 24 divisors (see below), whose sum is σ = 45999408. Its totient is φ = 6065712.

The previous prime is 19713779. The next prime is 19713809. The reversal of 19713798 is 89731791.

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, 41890 + ... + 42357.

It is an arithmetic number, because the mean of its divisors is an integer number (1916642).

Almost surely, 2^19713798 is an apocalyptic number.

19713798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19713798 is an abundant number, since it is smaller than the sum of its proper divisors (26285610).

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

19713798 is a wasteful number, since it uses less digits than its factorization.

19713798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84268 (or 84265 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 19713798 is about 4440.0222972413. The cubic root of 19713798 is about 270.1407496604.

The spelling of 19713798 in words is "nineteen million, seven hundred thirteen thousand, seven hundred ninety-eight".