22005161992 has 64 divisors (see below), whose sum is σ = 46013184000. Its totient is φ = 9779960640.

The previous prime is 22005161977. The next prime is 22005162013. The reversal of 22005161992 is 29916150022.

It is a super-2 number, since 2×22005161992² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5784363 + ... + 5788165.

It is an arithmetic number, because the mean of its divisors is an integer number (718956000).

Almost surely, 2^22005161992 is an apocalyptic number.

22005161992 is a gapful number since it is divisible by the number (22) 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 22005161992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23006592000).

22005161992 is an abundant number, since it is smaller than the sum of its proper divisors (24008022008).

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

22005161992 is a wasteful number, since it uses less digits than its factorization.

22005161992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266 (or 5262 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 22005161992 in words is "twenty-two billion, five million, one hundred sixty-one thousand, nine hundred ninety-two".