21219219484 has 6 divisors (see below), whose sum is σ = 37133634104. Its totient is φ = 10609609740.

The previous prime is 21219219403. The next prime is 21219219493. The reversal of 21219219484 is 48491291212.

It is a self number, because there is not a number n which added to its sum of digits gives 21219219484.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2652402432 + ... + 2652402439.

Almost surely, 2^21219219484 is an apocalyptic number.

It is an amenable number.

21219219484 is a deficient number, since it is larger than the sum of its proper divisors (15914414620).

21219219484 is a wasteful number, since it uses less digits than its factorization.

21219219484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5304804875 (or 5304804873 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The spelling of 21219219484 in words is "twenty-one billion, two hundred nineteen million, two hundred nineteen thousand, four hundred eighty-four".