222774120018 has 126 divisors (see below), whose sum is σ = 513853011399. Its totient is φ = 72401739192.

The previous prime is 222774120013. The next prime is 222774120067. The reversal of 222774120018 is 810021477222.

222774120018 is a `hidden beast` number, since 2 + 227 + 7 + 412 + 0 + 0 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 111387060009 + 111387060009 = 333747^2 + 333747^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333747.

It is not an unprimeable number, because it can be changed into a prime (222774120011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 847049755 + ... + 847050017.

Almost surely, 2^222774120018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222774120018

222774120018 is an abundant number, since it is smaller than the sum of its proper divisors (291078891381).

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

222774120018 is an frugal number, since it uses more digits than its factorization.

222774120018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The spelling of 222774120018 in words is "two hundred twenty-two billion, seven hundred seventy-four million, one hundred twenty thousand, eighteen".