22006181808 has 120 divisors (see below), whose sum is σ = 66364137840. Its totient is φ = 6767055360.

The previous prime is 22006181807. The next prime is 22006181831. The reversal of 22006181808 is 80818160022.

22006181808 is a `hidden beast` number, since 2 + 20 + 0 + 618 + 18 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22006181807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4975438 + ... + 4979858.

It is an arithmetic number, because the mean of its divisors is an integer number (553034482).

Almost surely, 2^22006181808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22006181808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33182068920).

22006181808 is an abundant number, since it is smaller than the sum of its proper divisors (44357956032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22006181808 is a wasteful number, since it uses less digits than its factorization.

22006181808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107 (or 7098 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The spelling of 22006181808 in words is "twenty-two billion, six million, one hundred eighty-one thousand, eight hundred eight".