22721729722 has 4 divisors (see below), whose sum is σ = 34082594586. Its totient is φ = 11360864860.

The previous prime is 22721729707. The next prime is 22721729759. The reversal of 22721729722 is 22792712722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13107731121 + 9613998601 = 114489^2 + 98051^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5680432429 + ... + 5680432432.

Almost surely, 2^22721729722 is an apocalyptic number.

22721729722 is a deficient number, since it is larger than the sum of its proper divisors (11360864864).

22721729722 is a wasteful number, since it uses less digits than its factorization.

22721729722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11360864863.

The product of its digits is 197568, while the sum is 43.

The spelling of 22721729722 in words is "twenty-two billion, seven hundred twenty-one million, seven hundred twenty-nine thousand, seven hundred twenty-two".