19790971107 has 16 divisors (see below), whose sum is σ = 28695337632. Its totient is φ = 12082245120.

The previous prime is 19790971099. The next prime is 19790971111. The reversal of 19790971107 is 70117909791.

It is not a de Polignac number, because 19790971107 - 2³ = 19790971099 is a prime.

It is a super-3 number, since 3×19790971107³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 19790971107.

It is not an unprimeable number, because it can be changed into a prime (19790971177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5242144 + ... + 5245917.

It is an arithmetic number, because the mean of its divisors is an integer number (1793458602).

Almost surely, 2^19790971107 is an apocalyptic number.

19790971107 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

19790971107 is a deficient number, since it is larger than the sum of its proper divisors (8904366525).

19790971107 is a wasteful number, since it uses less digits than its factorization.

19790971107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10488118.

The product of its (nonzero) digits is 250047, while the sum is 51.

The spelling of 19790971107 in words is "nineteen billion, seven hundred ninety million, nine hundred seventy-one thousand, one hundred seven".