19999175009 has 4 divisors (see below), whose sum is σ = 21817281840. Its totient is φ = 18181068180.

The previous prime is 19999174997. The next prime is 19999175011. The reversal of 19999175009 is 90057199991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19999175009 - 2¹² = 19999170913 is a prime.

It is a super-2 number, since 2×19999175009² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19999175039) 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 in 3 ways as a sum of consecutive naturals, for example, 909053399 + ... + 909053420.

It is an arithmetic number, because the mean of its divisors is an integer number (5454320460).

Almost surely, 2^19999175009 is an apocalyptic number.

It is an amenable number.

19999175009 is a deficient number, since it is larger than the sum of its proper divisors (1818106831).

19999175009 is a wasteful number, since it uses less digits than its factorization.

19999175009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818106830.

The product of its (nonzero) digits is 2066715, while the sum is 59.

The spelling of 19999175009 in words is "nineteen billion, nine hundred ninety-nine million, one hundred seventy-five thousand, nine".