19743968 has 12 divisors (see below), whose sum is σ = 38871000. Its totient is φ = 9871968.

The previous prime is 19743949. The next prime is 19743989. The reversal of 19743968 is 86934791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308468 + ... + 308531.

It is an arithmetic number, because the mean of its divisors is an integer number (3239250).

Almost surely, 2^19743968 is an apocalyptic number.

It is an amenable number.

19743968 is a deficient number, since it is larger than the sum of its proper divisors (19127032).

19743968 is an equidigital number, since it uses as much as digits as its factorization.

19743968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617009 (or 617001 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 19743968 is about 4443.4185038099. The cubic root of 19743968 is about 270.2784872370.

The spelling of 19743968 in words is "nineteen million, seven hundred forty-three thousand, nine hundred sixty-eight".