22040668520 has 64 divisors (see below), whose sum is σ = 53500487040. Its totient is φ = 8123731200.

The previous prime is 22040668511. The next prime is 22040668571. The reversal of 22040668520 is 2586604022.

It is a Cunningham number, because it is equal to 148461²-1.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259805 + ... + 334035.

It is an arithmetic number, because the mean of its divisors is an integer number (835945110).

Almost surely, 2^22040668520 is an apocalyptic number.

22040668520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22040668520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26750243520).

22040668520 is an abundant number, since it is smaller than the sum of its proper divisors (31459818520).

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

22040668520 is a wasteful number, since it uses less digits than its factorization.

22040668520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74826 (or 74822 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 22040668520 in words is "twenty-two billion, forty million, six hundred sixty-eight thousand, five hundred twenty".