19868288668 has 24 divisors (see below), whose sum is σ = 34860125664. Its totient is φ = 9908289600.

The previous prime is 19868288653. The next prime is 19868288677. The reversal of 19868288668 is 86688286891.

It is a junction number, because it is equal to n+sod(n) for n = 19868288597 and 19868288606.

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, 2613553 + ... + 2621143.

It is an arithmetic number, because the mean of its divisors is an integer number (1452505236).

Almost surely, 2^19868288668 is an apocalyptic number.

It is an amenable number.

19868288668 is a deficient number, since it is larger than the sum of its proper divisors (14991836996).

19868288668 is a wasteful number, since it uses less digits than its factorization.

19868288668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9213 (or 9211 counting only the distinct ones).

The product of its digits is 127401984, while the sum is 70.

The spelling of 19868288668 in words is "nineteen billion, eight hundred sixty-eight million, two hundred eighty-eight thousand, six hundred sixty-eight".