19221339 has 8 divisors (see below), whose sum is σ = 27136080. Its totient is φ = 12060416.

The previous prime is 19221317. The next prime is 19221341. The reversal of 19221339 is 93312291.

It is a happy number.

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 19221339 - 2¹³ = 19213147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19221359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188394 + ... + 188495.

It is an arithmetic number, because the mean of its divisors is an integer number (3392010).

Almost surely, 2^19221339 is an apocalyptic number.

19221339 is a deficient number, since it is larger than the sum of its proper divisors (7914741).

19221339 is a wasteful number, since it uses less digits than its factorization.

19221339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376909.

The product of its digits is 2916, while the sum is 30.

The square root of 19221339 is about 4384.2147529518. The cubic root of 19221339 is about 267.8723448997.

The spelling of 19221339 in words is "nineteen million, two hundred twenty-one thousand, three hundred thirty-nine".