21068926224 has 20 divisors (see below), whose sum is σ = 54428059536. Its totient is φ = 7022975392.

The previous prime is 21068926201. The next prime is 21068926259. The reversal of 21068926224 is 42262986012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219467934 + ... + 219468029.

Almost surely, 2^21068926224 is an apocalyptic number.

21068926224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21068926224 is an abundant number, since it is smaller than the sum of its proper divisors (33359133312).

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

21068926224 is a wasteful number, since it uses less digits than its factorization.

21068926224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438935974 (or 438935968 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 21068926224 in words is "twenty-one billion, sixty-eight million, nine hundred twenty-six thousand, two hundred twenty-four".