21973944505 has 8 divisors (see below), whose sum is σ = 27756561600. Its totient is φ = 16653936816.

The previous prime is 21973944497. The next prime is 21973944511. The reversal of 21973944505 is 50544937912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21973944505 - 2³ = 21973944497 is a prime.

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, 115652245 + ... + 115652434.

It is an arithmetic number, because the mean of its divisors is an integer number (3469570200).

Almost surely, 2^21973944505 is an apocalyptic number.

It is an amenable number.

21973944505 is a deficient number, since it is larger than the sum of its proper divisors (5782617095).

21973944505 is a wasteful number, since it uses less digits than its factorization.

21973944505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231304703.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 21973944505 in words is "twenty-one billion, nine hundred seventy-three million, nine hundred forty-four thousand, five hundred five".