19968320 has 28 divisors (see below), whose sum is σ = 47550324. Its totient is φ = 7987200.

The previous prime is 19968317. The next prime is 19968331. The reversal of 19968320 is 2386991.

It can be written as a sum of positive squares in 2 ways, for example, as 14622976 + 5345344 = 3824^2 + 2312^2 .

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, 30881 + ... + 31520.

Almost surely, 2^19968320 is an apocalyptic number.

19968320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19968320 is an abundant number, since it is smaller than the sum of its proper divisors (27582004).

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

19968320 is an equidigital number, since it uses as much as digits as its factorization.

19968320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62418 (or 62408 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 19968320 is about 4468.5926196063. The cubic root of 19968320 is about 271.2983646691.

The spelling of 19968320 in words is "nineteen million, nine hundred sixty-eight thousand, three hundred twenty".