19668609107 has 8 divisors (see below), whose sum is σ = 23661484800. Its totient is φ = 15971502024.

The previous prime is 19668609083. The next prime is 19668609109. The reversal of 19668609107 is 70190686691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19668609107 - 2¹⁸ = 19668346963 is a prime.

It is a super-3 number, since 3×19668609107³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19668609109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73942007 + ... + 73942272.

It is an arithmetic number, because the mean of its divisors is an integer number (2957685600).

Almost surely, 2^19668609107 is an apocalyptic number.

19668609107 is a deficient number, since it is larger than the sum of its proper divisors (3992875693).

19668609107 is a wasteful number, since it uses less digits than its factorization.

19668609107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147884305.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 19668609107 in words is "nineteen billion, six hundred sixty-eight million, six hundred nine thousand, one hundred seven".