22004168721 has 8 divisors (see below), whose sum is σ = 29418835584. Its totient is φ = 14629473840.

The previous prime is 22004168707. The next prime is 22004168729. The reversal of 22004168721 is 12786140022.

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

It is not a de Polignac number, because 22004168721 - 2⁵ = 22004168689 is a prime.

It is a super-2 number, since 2×22004168721² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22004168729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9991710 + ... + 9993911.

It is an arithmetic number, because the mean of its divisors is an integer number (3677354448).

Almost surely, 2^22004168721 is an apocalyptic number.

It is an amenable number.

22004168721 is a deficient number, since it is larger than the sum of its proper divisors (7414666863).

22004168721 is a wasteful number, since it uses less digits than its factorization.

22004168721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19985991.

The product of its (nonzero) digits is 10752, while the sum is 33.

The spelling of 22004168721 in words is "twenty-two billion, four million, one hundred sixty-eight thousand, seven hundred twenty-one".