19338221 has 8 divisors (see below), whose sum is σ = 22224384. Its totient is φ = 16482960.

The previous prime is 19338191. The next prime is 19338227. The reversal of 19338221 is 12283391.

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 19338221 - 2¹⁸ = 19076077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19338227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6365 + ... + 8898.

It is an arithmetic number, because the mean of its divisors is an integer number (2778048).

Almost surely, 2^19338221 is an apocalyptic number.

It is an amenable number.

19338221 is a deficient number, since it is larger than the sum of its proper divisors (2886163).

19338221 is a wasteful number, since it uses less digits than its factorization.

19338221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15451.

The product of its digits is 2592, while the sum is 29.

The square root of 19338221 is about 4397.5244172148. The cubic root of 19338221 is about 268.4142115249.

The spelling of 19338221 in words is "nineteen million, three hundred thirty-eight thousand, two hundred twenty-one".