19144209 has 16 divisors (see below), whose sum is σ = 29399040. Its totient is φ = 10854480.

The previous prime is 19144201. The next prime is 19144217. The reversal of 19144209 is 90244191.

It is an interprime number because it is at equal distance from previous prime (19144201) and next prime (19144217).

It is not a de Polignac number, because 19144209 - 2³ = 19144201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19144201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729 + ... + 6230.

It is an arithmetic number, because the mean of its divisors is an integer number (1837440).

Almost surely, 2^19144209 is an apocalyptic number.

It is an amenable number.

19144209 is a deficient number, since it is larger than the sum of its proper divisors (10254831).

19144209 is a wasteful number, since it uses less digits than its factorization.

19144209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 19144209 is about 4375.4095808278. The cubic root of 19144209 is about 267.5135649801.

The spelling of 19144209 in words is "nineteen million, one hundred forty-four thousand, two hundred nine".