19669086616 has 8 divisors (see below), whose sum is σ = 36879537420. Its totient is φ = 9834543304.

The previous prime is 19669086611. The next prime is 19669086629. The reversal of 19669086616 is 61668096691.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19669086611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1229317906 + ... + 1229317921.

Almost surely, 2^19669086616 is an apocalyptic number.

It is an amenable number.

19669086616 is a deficient number, since it is larger than the sum of its proper divisors (17210450804).

19669086616 is a wasteful number, since it uses less digits than its factorization.

19669086616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458635833 (or 2458635829 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 58.

The spelling of 19669086616 in words is "nineteen billion, six hundred sixty-nine million, eighty-six thousand, six hundred sixteen".