19713724 has 12 divisors (see below), whose sum is σ = 34574400. Its totient is φ = 9835328.

The previous prime is 19713719. The next prime is 19713731. The reversal of 19713724 is 42731791.

It is a self number, because there is not a number n which added to its sum of digits gives 19713724.

It is a congruent number.

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, 3229 + ... + 7060.

It is an arithmetic number, because the mean of its divisors is an integer number (2881200).

Almost surely, 2^19713724 is an apocalyptic number.

It is an amenable number.

19713724 is a deficient number, since it is larger than the sum of its proper divisors (14860676).

19713724 is a wasteful number, since it uses less digits than its factorization.

19713724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10772 (or 10770 counting only the distinct ones).

The product of its digits is 10584, while the sum is 34.

The square root of 19713724 is about 4440.0139639420. The cubic root of 19713724 is about 270.1404116494.

The spelling of 19713724 in words is "nineteen million, seven hundred thirteen thousand, seven hundred twenty-four".