19681909101 has 12 divisors (see below), whose sum is σ = 28430640160. Its totient is φ = 13120711560.

The previous prime is 19681909099. The next prime is 19681909123. The reversal of 19681909101 is 10190918691.

It is not a de Polignac number, because 19681909101 - 2¹ = 19681909099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19681904101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394710 + ... + 441768.

Almost surely, 2^19681909101 is an apocalyptic number.

It is an amenable number.

19681909101 is a deficient number, since it is larger than the sum of its proper divisors (8748731059).

19681909101 is a wasteful number, since it uses less digits than its factorization.

19681909101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93536 (or 93533 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 45.

The spelling of 19681909101 in words is "nineteen billion, six hundred eighty-one million, nine hundred nine thousand, one hundred one".