19712242568 has 12 divisors (see below), whose sum is σ = 36961199415. Its totient is φ = 9855922728.

The previous prime is 19712242567. The next prime is 19712242579. The reversal of 19712242568 is 86524221791.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 9856121284 + 9856121284 = 99278^2 + 99278^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99278.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19712242567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 372293 + ... + 421931.

Almost surely, 2^19712242568 is an apocalyptic number.

It is an amenable number.

19712242568 is a deficient number, since it is larger than the sum of its proper divisors (17248956847).

19712242568 is an frugal number, since it uses more digits than its factorization.

19712242568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99284 (or 49641 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The spelling of 19712242568 in words is "nineteen billion, seven hundred twelve million, two hundred forty-two thousand, five hundred sixty-eight".