999999000019 has 8 divisors (see below), whose sum is σ = 1003022931680. Its totient is φ = 996979046976.

The previous prime is 999999000001. The next prime is 999999000053. The reversal of 999999000019 is 910000999999.

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

It is a cyclic number.

It is not a de Polignac number, because 999999000019 - 2⁹ = 999998999507 is a prime.

It is a super-2 number, since 2×999999000019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999999000059) 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, 490824 + ... + 1496965.

It is an arithmetic number, because the mean of its divisors is an integer number (125377866460).

Almost surely, 2^999999000019 is an apocalyptic number.

999999000019 is a deficient number, since it is larger than the sum of its proper divisors (3023931661).

999999000019 is a wasteful number, since it uses less digits than its factorization.

999999000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989309.

The product of its (nonzero) digits is 4782969, while the sum is 64.

The spelling of 999999000019 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nineteen", and thus it is an aban number.