19238833309 has 8 divisors (see below), whose sum is σ = 20391921720. Its totient is φ = 18088121856.

The previous prime is 19238833303. The next prime is 19238833331. The reversal of 19238833309 is 90333883291.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1648116409 + 17590716900 = 40597^2 + 132630^2 .

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

It is not a de Polignac number, because 19238833309 - 2⁷ = 19238833181 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 (19238833303) 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, 577554 + ... + 609955.

It is an arithmetic number, because the mean of its divisors is an integer number (2548990215).

Almost surely, 2^19238833309 is an apocalyptic number.

It is an amenable number.

19238833309 is a deficient number, since it is larger than the sum of its proper divisors (1153088411).

19238833309 is a wasteful number, since it uses less digits than its factorization.

19238833309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188479.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 19238833309 in words is "nineteen billion, two hundred thirty-eight million, eight hundred thirty-three thousand, three hundred nine".