18210227056 has 80 divisors (see below), whose sum is σ = 41750899200. Its totient is φ = 7528437504.

The previous prime is 18210227051. The next prime is 18210227081. The reversal of 18210227056 is 65072201281.

It is a happy number.

It is a super-2 number, since 2×18210227056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18210227051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5256781 + ... + 5260243.

It is an arithmetic number, because the mean of its divisors is an integer number (521886240).

Almost surely, 2^18210227056 is an apocalyptic number.

18210227056 is a gapful number since it is divisible by the number (16) 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 18210227056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20875449600).

18210227056 is an abundant number, since it is smaller than the sum of its proper divisors (23540672144).

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

18210227056 is a wasteful number, since it uses less digits than its factorization.

18210227056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126 (or 5120 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 18210227056 in words is "eighteen billion, two hundred ten million, two hundred twenty-seven thousand, fifty-six".