19204239 has 4 divisors (see below), whose sum is σ = 25605656. Its totient is φ = 12802824.

The previous prime is 19204223. The next prime is 19204267. The reversal of 19204239 is 93240291.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19204239 - 2⁴ = 19204223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19204219) 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, 3200704 + ... + 3200709.

It is an arithmetic number, because the mean of its divisors is an integer number (6401414).

Almost surely, 2^19204239 is an apocalyptic number.

19204239 is a deficient number, since it is larger than the sum of its proper divisors (6401417).

19204239 is an equidigital number, since it uses as much as digits as its factorization.

19204239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6401416.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 19204239 is about 4382.2641408295. The cubic root of 19204239 is about 267.7928850152.

The spelling of 19204239 in words is "nineteen million, two hundred four thousand, two hundred thirty-nine".