19142517668 has 12 divisors (see below), whose sum is σ = 34067192880. Its totient is φ = 9409033992.

The previous prime is 19142517649. The next prime is 19142517697. The reversal of 19142517668 is 86671524191.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40555946 + ... + 40556417.

It is an arithmetic number, because the mean of its divisors is an integer number (2838932740).

Almost surely, 2^19142517668 is an apocalyptic number.

It is an amenable number.

19142517668 is a deficient number, since it is larger than the sum of its proper divisors (14924675212).

19142517668 is a wasteful number, since it uses less digits than its factorization.

19142517668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81112426 (or 81112424 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The spelling of 19142517668 in words is "nineteen billion, one hundred forty-two million, five hundred seventeen thousand, six hundred sixty-eight".