19127844668 has 24 divisors (see below), whose sum is σ = 33802041504. Its totient is φ = 9470520000.

The previous prime is 19127844649. The next prime is 19127844709. The reversal of 19127844668 is 86644872191.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141518 + ... + 241418.

It is an arithmetic number, because the mean of its divisors is an integer number (1408418396).

Almost surely, 2^19127844668 is an apocalyptic number.

It is an amenable number.

19127844668 is a deficient number, since it is larger than the sum of its proper divisors (14674196836).

19127844668 is a wasteful number, since it uses less digits than its factorization.

19127844668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100373 (or 100371 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 56.

The spelling of 19127844668 in words is "nineteen billion, one hundred twenty-seven million, eight hundred forty-four thousand, six hundred sixty-eight".