19963968 has 28 divisors (see below), whose sum is σ = 52821840. Its totient is φ = 6654592.

The previous prime is 19963961. The next prime is 19963973. The reversal of 19963968 is 86936991.

It is a self number, because there is not a number n which added to its sum of digits gives 19963968.

It is not an unprimeable number, because it can be changed into a prime (19963961) 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, 51798 + ... + 52181.

Almost surely, 2^19963968 is an apocalyptic number.

It is an amenable number.

19963968 is an abundant number, since it is smaller than the sum of its proper divisors (32857872).

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

19963968 is a wasteful number, since it uses less digits than its factorization.

19963968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103994 (or 103984 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 19963968 is about 4468.1056388586. The cubic root of 19963968 is about 271.2786538426.

The spelling of 19963968 in words is "nineteen million, nine hundred sixty-three thousand, nine hundred sixty-eight".