19221769442 has 8 divisors (see below), whose sum is σ = 29503181136. Its totient is φ = 9387375732.

The previous prime is 19221769439. The next prime is 19221769451. The reversal of 19221769442 is 24496712291.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111754388 + ... + 111754559.

It is an arithmetic number, because the mean of its divisors is an integer number (3687897642).

Almost surely, 2^19221769442 is an apocalyptic number.

19221769442 is a deficient number, since it is larger than the sum of its proper divisors (10281411694).

19221769442 is a wasteful number, since it uses less digits than its factorization.

19221769442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223508992.

The product of its digits is 435456, while the sum is 47.

The spelling of 19221769442 in words is "nineteen billion, two hundred twenty-one million, seven hundred sixty-nine thousand, four hundred forty-two".