22721606972 has 24 divisors (see below), whose sum is σ = 42129281376. Its totient is φ = 10685541888.

The previous prime is 22721606933. The next prime is 22721606977. The reversal of 22721606972 is 27960612722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22721606977) 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, 3353 + ... + 213200.

It is an arithmetic number, because the mean of its divisors is an integer number (1755386724).

Almost surely, 2^22721606972 is an apocalyptic number.

It is an amenable number.

22721606972 is a deficient number, since it is larger than the sum of its proper divisors (19407674404).

22721606972 is a wasteful number, since it uses less digits than its factorization.

22721606972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218117 (or 218115 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 22721606972 in words is "twenty-two billion, seven hundred twenty-one million, six hundred six thousand, nine hundred seventy-two".