19680650 has 36 divisors (see below), whose sum is σ = 40248726. Its totient is φ = 7154400.

The previous prime is 19680641. The next prime is 19680667. The reversal of 19680650 is 5608691.

It can be written as a sum of positive squares in 3 ways, for example, as 19070689 + 609961 = 4367^2 + 781^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19680650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4424 + ... + 7676.

Almost surely, 2^19680650 is an apocalyptic number.

19680650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19680650 is an abundant number, since it is smaller than the sum of its proper divisors (20568076).

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

19680650 is a wasteful number, since it uses less digits than its factorization.

19680650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287 (or 3271 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 19680650 is about 4436.2878626167. The cubic root of 19680650 is about 269.9892542591.

The spelling of 19680650 in words is "nineteen million, six hundred eighty thousand, six hundred fifty".