19845968 has 20 divisors (see below), whose sum is σ = 39390708. Its totient is φ = 9680640.

The previous prime is 19845967. The next prime is 19845979. The reversal of 19845968 is 86954891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10061584 + 9784384 = 3172^2 + 3128^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19845961) 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, 14471 + ... + 15782.

Almost surely, 2^19845968 is an apocalyptic number.

It is an amenable number.

19845968 is a deficient number, since it is larger than the sum of its proper divisors (19544740).

19845968 is a wasteful number, since it uses less digits than its factorization.

19845968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30302 (or 30296 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 19845968 is about 4454.8813676685. The cubic root of 19845968 is about 270.7431197339.

The spelling of 19845968 in words is "nineteen million, eight hundred forty-five thousand, nine hundred sixty-eight".