19426671209 has 8 divisors (see below), whose sum is σ = 21709628640. Its totient is φ = 17229863200.

The previous prime is 19426671191. The next prime is 19426671211. The reversal of 19426671209 is 90217662491.

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

It is a de Polignac number, because none of the positive numbers 2^k-19426671209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19426671259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21536879 + ... + 21537780.

It is an arithmetic number, because the mean of its divisors is an integer number (2713703580).

Almost surely, 2^19426671209 is an apocalyptic number.

It is an amenable number.

19426671209 is a deficient number, since it is larger than the sum of its proper divisors (2282957431).

19426671209 is a wasteful number, since it uses less digits than its factorization.

19426671209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43074711.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 19426671209 in words is "nineteen billion, four hundred twenty-six million, six hundred seventy-one thousand, two hundred nine".