19000109 has 8 divisors (see below), whose sum is σ = 19596192. Its totient is φ = 18411120.

The previous prime is 19000103. The next prime is 19000123. The reversal of 19000109 is 90100091.

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 19000109 - 2¹² = 18996013 is a prime.

It is a super-2 number, since 2×19000109² = 722008284023762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19000103) 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 7 ways as a sum of consecutive naturals, for example, 3947 + ... + 7319.

It is an arithmetic number, because the mean of its divisors is an integer number (2449524).

Almost surely, 2^19000109 is an apocalyptic number.

It is an amenable number.

19000109 is a deficient number, since it is larger than the sum of its proper divisors (596083).

19000109 is a wasteful number, since it uses less digits than its factorization.

19000109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 19000109 is about 4358.9114466802. The cubic root of 19000109 is about 266.8406751445.

The spelling of 19000109 in words is "nineteen million, one hundred nine", and thus it is an aban number.