22161347208 has 864 divisors, whose sum is σ = 85918060800. Its totient is φ = 5094835200.

The previous prime is 22161347171. The next prime is 22161347213. The reversal of 22161347208 is 80274316122.

It is a happy number.

22161347208 is a `hidden beast` number, since 22 + 161 + 3 + 472 + 0 + 8 = 666.

It is a super-2 number, since 2×22161347208² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 203315058 + ... + 203315166.

It is an arithmetic number, because the mean of its divisors is an integer number (99442200).

Almost surely, 2^22161347208 is an apocalyptic number.

22161347208 is a gapful number since it is divisible by the number (28) 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 22161347208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42959030400).

22161347208 is an abundant number, since it is smaller than the sum of its proper divisors (63756713592).

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

22161347208 is a wasteful number, since it uses less digits than its factorization.

22161347208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 22161347208 in words is "twenty-two billion, one hundred sixty-one million, three hundred forty-seven thousand, two hundred eight".