19221110608 has 20 divisors (see below), whose sum is σ = 42561030880. Its totient is φ = 8237618784.

The previous prime is 19221110599. The next prime is 19221110609. The reversal of 19221110608 is 80601112291.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19221110608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19221110609) by changing a digit.

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, 85808418 + ... + 85808641.

It is an arithmetic number, because the mean of its divisors is an integer number (2128051544).

Almost surely, 2^19221110608 is an apocalyptic number.

It is an amenable number.

19221110608 is an abundant number, since it is smaller than the sum of its proper divisors (23339920272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19221110608 is a wasteful number, since it uses less digits than its factorization.

19221110608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171617074 (or 171617068 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 31.

Adding to 19221110608 its reverse (80601112291), we get a palindrome (99822222899).

The spelling of 19221110608 in words is "nineteen billion, two hundred twenty-one million, one hundred ten thousand, six hundred eight".