19319968 has 12 divisors (see below), whose sum is σ = 38036250. Its totient is φ = 9659968.

The previous prime is 19319959. The next prime is 19319969. The reversal of 19319968 is 86991391.

It can be written as a sum of positive squares in only one way, i.e., 18421264 + 898704 = 4292^2 + 948^2 .

It is a super-2 number, since 2×19319968² = 746522327042048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19319969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301843 + ... + 301906.

Almost surely, 2^19319968 is an apocalyptic number.

It is an amenable number.

19319968 is a deficient number, since it is larger than the sum of its proper divisors (18716282).

19319968 is an equidigital number, since it uses as much as digits as its factorization.

19319968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603759 (or 603751 counting only the distinct ones).

The product of its digits is 104976, while the sum is 46.

The square root of 19319968 is about 4395.4485550396. The cubic root of 19319968 is about 268.3297344870.

The spelling of 19319968 in words is "nineteen million, three hundred nineteen thousand, nine hundred sixty-eight".