19839670807 has 4 divisors (see below), whose sum is σ = 21643277256. Its totient is φ = 18036064360.

The previous prime is 19839670757. The next prime is 19839670859. The reversal of 19839670807 is 70807693891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19839670807 - 2⁷ = 19839670679 is a prime.

It is a super-2 number, since 2×19839670807² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19839670867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901803208 + ... + 901803229.

It is an arithmetic number, because the mean of its divisors is an integer number (5410819314).

Almost surely, 2^19839670807 is an apocalyptic number.

19839670807 is a deficient number, since it is larger than the sum of its proper divisors (1803606449).

19839670807 is a wasteful number, since it uses less digits than its factorization.

19839670807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803606448.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 19839670807 in words is "nineteen billion, eight hundred thirty-nine million, six hundred seventy thousand, eight hundred seven".