19424169 has 12 divisors (see below), whose sum is σ = 28517892. Its totient is φ = 12736800.

The previous prime is 19424159. The next prime is 19424177. The reversal of 19424169 is 96142491.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7952400 + 11471769 = 2820^2 + 3387^2 .

It is not a de Polignac number, because 19424169 - 2²⁰ = 18375593 is a prime.

It is a super-2 number, since 2×19424169² = 754596682681122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19424159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17142 + ... + 18239.

It is an arithmetic number, because the mean of its divisors is an integer number (2376491).

Almost surely, 2^19424169 is an apocalyptic number.

It is an amenable number.

19424169 is a deficient number, since it is larger than the sum of its proper divisors (9093723).

19424169 is a wasteful number, since it uses less digits than its factorization.

19424169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35448 (or 35445 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 19424169 is about 4407.2858995078. The cubic root of 19424169 is about 268.8112761665.

The spelling of 19424169 in words is "nineteen million, four hundred twenty-four thousand, one hundred sixty-nine".