21930268799 has 4 divisors (see below), whose sum is σ = 21930576360. Its totient is φ = 21929961240.

The previous prime is 21930268777. The next prime is 21930268813. The reversal of 21930268799 is 99786203912.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21930268799 - 2⁸ = 21930268543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21930268709) 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, 14717 + ... + 209945.

It is an arithmetic number, because the mean of its divisors is an integer number (5482644090).

Almost surely, 2^21930268799 is an apocalyptic number.

21930268799 is a deficient number, since it is larger than the sum of its proper divisors (307561).

21930268799 is a wasteful number, since it uses less digits than its factorization.

21930268799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307560.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 21930268799 in words is "twenty-one billion, nine hundred thirty million, two hundred sixty-eight thousand, seven hundred ninety-nine".