19164307906 has 4 divisors (see below), whose sum is σ = 28746461862. Its totient is φ = 9582153952.

The previous prime is 19164307889. The next prime is 19164307909. The reversal of 19164307906 is 60970346191.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 15727417281 + 3436890625 = 125409^2 + 58625^2 .

It is not an unprimeable number, because it can be changed into a prime (19164307909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4791076975 + ... + 4791076978.

Almost surely, 2^19164307906 is an apocalyptic number.

19164307906 is a deficient number, since it is larger than the sum of its proper divisors (9582153956).

19164307906 is an equidigital number, since it uses as much as digits as its factorization.

19164307906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9582153955.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 19164307906 in words is "nineteen billion, one hundred sixty-four million, three hundred seven thousand, nine hundred six".