19242239 has 4 divisors (see below), whose sum is σ = 19251600. Its totient is φ = 19232880.

The previous prime is 19242229. The next prime is 19242263. The reversal of 19242239 is 93224291.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93224291 = 1321 ⋅70571.

It is a cyclic number.

It is not a de Polignac number, because 19242239 - 2²⁰ = 18193663 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19242229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107 + ... + 6204.

It is an arithmetic number, because the mean of its divisors is an integer number (4812900).

Almost surely, 2^19242239 is an apocalyptic number.

19242239 is a deficient number, since it is larger than the sum of its proper divisors (9361).

19242239 is an equidigital number, since it uses as much as digits as its factorization.

19242239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9360.

The product of its digits is 7776, while the sum is 32.

The square root of 19242239 is about 4386.5976564987. The cubic root of 19242239 is about 267.9693985628.

The spelling of 19242239 in words is "nineteen million, two hundred forty-two thousand, two hundred thirty-nine".