22726217721 has 8 divisors (see below), whose sum is σ = 30302640864. Its totient is φ = 15150303200.

The previous prime is 22726217711. The next prime is 22726217741. The reversal of 22726217721 is 12771262722.

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 22726217721 - 2⁹ = 22726217209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22726217721.

It is not an unprimeable number, because it can be changed into a prime (22726217711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6555 + ... + 213296.

It is an arithmetic number, because the mean of its divisors is an integer number (3787830108).

Almost surely, 2^22726217721 is an apocalyptic number.

It is an amenable number.

22726217721 is a deficient number, since it is larger than the sum of its proper divisors (7576423143).

22726217721 is a wasteful number, since it uses less digits than its factorization.

22726217721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254311.

The product of its digits is 65856, while the sum is 39.

The spelling of 22726217721 in words is "twenty-two billion, seven hundred twenty-six million, two hundred seventeen thousand, seven hundred twenty-one".