19797530909 has 8 divisors (see below), whose sum is σ = 22442545440. Its totient is φ = 17312820336.

The previous prime is 19797530881. The next prime is 19797530917. The reversal of 19797530909 is 90903579791.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19797530909 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 (19797530009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40075727 + ... + 40076220.

It is an arithmetic number, because the mean of its divisors is an integer number (2805318180).

Almost surely, 2^19797530909 is an apocalyptic number.

19797530909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19797530909 is a deficient number, since it is larger than the sum of its proper divisors (2645014531).

19797530909 is a wasteful number, since it uses less digits than its factorization.

19797530909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80151979.

The product of its (nonzero) digits is 4822335, while the sum is 59.

The spelling of 19797530909 in words is "nineteen billion, seven hundred ninety-seven million, five hundred thirty thousand, nine hundred nine".