21279266224 has 30 divisors (see below), whose sum is σ = 43099079156. Its totient is φ = 10177036320.

The previous prime is 21279266219. The next prime is 21279266237. The reversal of 21279266224 is 42266297212.

It is a happy number.

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 5 ways as a sum of consecutive naturals, for example, 1248582 + ... + 1265509.

Almost surely, 2^21279266224 is an apocalyptic number.

It is an amenable number.

21279266224 is an abundant number, since it is smaller than the sum of its proper divisors (21819812932).

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

21279266224 is a wasteful number, since it uses less digits than its factorization.

21279266224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514145 (or 2514116 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The spelling of 21279266224 in words is "twenty-one billion, two hundred seventy-nine million, two hundred sixty-six thousand, two hundred twenty-four".