218728226022 has 8 divisors (see below), whose sum is σ = 437456452056. Its totient is φ = 72909408672.

The previous prime is 218728226011. The next prime is 218728226053. The reversal of 218728226022 is 220622827812.

It is a sphenic number, since it is the product of 3 distinct primes.

218728226022 is an admirable number.

It is a super-2 number, since 2×218728226022² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18227352163 + ... + 18227352174.

It is an arithmetic number, because the mean of its divisors is an integer number (54682056507).

Almost surely, 2^218728226022 is an apocalyptic number.

218728226022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

218728226022 is a wasteful number, since it uses less digits than its factorization.

218728226022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36454704342.

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 218728226022 in words is "two hundred eighteen billion, seven hundred twenty-eight million, two hundred twenty-six thousand, twenty-two".