22261766018 has 6 divisors (see below), whose sum is σ = 33392965539. Its totient is φ = 11130777506.

The previous prime is 22261766003. The next prime is 22261766039. The reversal of 22261766018 is 81066716222.

It can be written as a sum of positive squares in only one way, i.e., 11130883009 + 11130883009 = 105503^2 + 105503^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105503.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 158255 + ... + 263757.

Almost surely, 2^22261766018 is an apocalyptic number.

22261766018 is a deficient number, since it is larger than the sum of its proper divisors (11131199521).

22261766018 is an frugal number, since it uses more digits than its factorization.

22261766018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211008 (or 105505 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 22261766018 in words is "twenty-two billion, two hundred sixty-one million, seven hundred sixty-six thousand, eighteen".