22018756881 has 32 divisors (see below), whose sum is σ = 34046562816. Its totient is φ = 12509600000.

The previous prime is 22018756843. The next prime is 22018756889. The reversal of 22018756881 is 18865781022.

It is a cyclic number.

It is not a de Polignac number, because 22018756881 - 2¹¹ = 22018754833 is a prime.

It is a super-2 number, since 2×22018756881² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22018756881.

It is not an unprimeable number, because it can be changed into a prime (22018756889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62626 + ... + 218996.

It is an arithmetic number, because the mean of its divisors is an integer number (1063955088).

Almost surely, 2^22018756881 is an apocalyptic number.

It is an amenable number.

22018756881 is a deficient number, since it is larger than the sum of its proper divisors (12027805935).

22018756881 is a wasteful number, since it uses less digits than its factorization.

22018756881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156653.

The product of its (nonzero) digits is 430080, while the sum is 48.

The spelling of 22018756881 in words is "twenty-two billion, eighteen million, seven hundred fifty-six thousand, eight hundred eighty-one".