22709214728 has 12 divisors (see below), whose sum is σ = 42580576815. Its totient is φ = 11354394248.

The previous prime is 22709214727. The next prime is 22709214769. The reversal of 22709214728 is 82741290722.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 11354607364 + 11354607364 = 106558^2 + 106558^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=106558.

It is a super-2 number, since 2×22709214728² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22709214721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 399593 + ... + 452871.

Almost surely, 2^22709214728 is an apocalyptic number.

It is an amenable number.

22709214728 is a deficient number, since it is larger than the sum of its proper divisors (19871362087).

22709214728 is an frugal number, since it uses more digits than its factorization.

22709214728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106564 (or 53281 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 22709214728 in words is "twenty-two billion, seven hundred nine million, two hundred fourteen thousand, seven hundred twenty-eight".