181822022208 has 336 divisors, whose sum is σ = 541280323584. Its totient is φ = 58321935360.

The previous prime is 181822022191. The next prime is 181822022219. The reversal of 181822022208 is 802220228181.

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 47 ways as a sum of consecutive naturals, for example, 592253991 + ... + 592254297.

It is an arithmetic number, because the mean of its divisors is an integer number (1610953344).

Almost surely, 2^181822022208 is an apocalyptic number.

181822022208 is a gapful number since it is divisible by the number (18) 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 181822022208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270640161792).

181822022208 is an abundant number, since it is smaller than the sum of its proper divisors (359458301376).

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

181822022208 is a wasteful number, since it uses less digits than its factorization.

181822022208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The spelling of 181822022208 in words is "one hundred eighty-one billion, eight hundred twenty-two million, twenty-two thousand, two hundred eight".