21759116938 has 16 divisors (see below), whose sum is σ = 36283193856. Its totient is φ = 9718711920.

The previous prime is 21759116909. The next prime is 21759116957. The reversal of 21759116938 is 83961195712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13497406 + ... + 13499017.

It is an arithmetic number, because the mean of its divisors is an integer number (2267699616).

Almost surely, 2^21759116938 is an apocalyptic number.

21759116938 is a deficient number, since it is larger than the sum of its proper divisors (14524076918).

21759116938 is a wasteful number, since it uses less digits than its factorization.

21759116938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26996469.

The product of its digits is 816480, while the sum is 52.

The spelling of 21759116938 in words is "twenty-one billion, seven hundred fifty-nine million, one hundred sixteen thousand, nine hundred thirty-eight".