19711867708 has 12 divisors (see below), whose sum is σ = 37149289240. Its totient is φ = 9097785072.

The previous prime is 19711867639. The next prime is 19711867709. The reversal of 19711867708 is 80776811791.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19711867709) 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, 189537138 + ... + 189537241.

Almost surely, 2^19711867708 is an apocalyptic number.

It is an amenable number.

19711867708 is a deficient number, since it is larger than the sum of its proper divisors (17437421532).

19711867708 is a wasteful number, since it uses less digits than its factorization.

19711867708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379074396 (or 379074394 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 55.

The spelling of 19711867708 in words is "nineteen billion, seven hundred eleven million, eight hundred sixty-seven thousand, seven hundred eight".