19486582568 has 8 divisors (see below), whose sum is σ = 36537342330. Its totient is φ = 9743291280.

The previous prime is 19486582559. The next prime is 19486582597. The reversal of 19486582568 is 86528568491.

It can be written as a sum of positive squares in only one way, i.e., 16982781124 + 2503801444 = 130318^2 + 50038^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 19486582568.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1217911403 + ... + 1217911418.

Almost surely, 2^19486582568 is an apocalyptic number.

It is an amenable number.

19486582568 is a deficient number, since it is larger than the sum of its proper divisors (17050759762).

19486582568 is a wasteful number, since it uses less digits than its factorization.

19486582568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435822827 (or 2435822823 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 62.

The spelling of 19486582568 in words is "nineteen billion, four hundred eighty-six million, five hundred eighty-two thousand, five hundred sixty-eight".