22002565538 has 18 divisors (see below), whose sum is σ = 33655317969. Its totient is φ = 10788257272.

The previous prime is 22002565513. The next prime is 22002565597. The reversal of 22002565538 is 83556520022.

It can be written as a sum of positive squares in 2 ways, for example, as 20870714089 + 1131851449 = 144467^2 + 33643^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104887.

It is a super-2 number, since 2×22002565538² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11117033 + ... + 11119011.

Almost surely, 2^22002565538 is an apocalyptic number.

22002565538 is a deficient number, since it is larger than the sum of its proper divisors (11652752431).

22002565538 is an frugal number, since it uses more digits than its factorization.

22002565538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 22002565538 in words is "twenty-two billion, two million, five hundred sixty-five thousand, five hundred thirty-eight".