22721045444 has 12 divisors (see below), whose sum is σ = 39770730384. Its totient is φ = 11357979624.

The previous prime is 22721045441. The next prime is 22721045447. The reversal of 22721045444 is 44454012722.

It is an interprime number because it is at equal distance from previous prime (22721045441) and next prime (22721045447).

It is not an unprimeable number, because it can be changed into a prime (22721045441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615602 + ... + 651465.

It is an arithmetic number, because the mean of its divisors is an integer number (3314227532).

Almost surely, 2^22721045444 is an apocalyptic number.

It is an amenable number.

22721045444 is a deficient number, since it is larger than the sum of its proper divisors (17049684940).

22721045444 is a wasteful number, since it uses less digits than its factorization.

22721045444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271554 (or 1271552 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 35.

The spelling of 22721045444 in words is "twenty-two billion, seven hundred twenty-one million, forty-five thousand, four hundred forty-four".