218400221922 has 16 divisors (see below), whose sum is σ = 437044624320. Its totient is φ = 72759377232.

The previous prime is 218400221917. The next prime is 218400221953. The reversal of 218400221922 is 229122004812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10162558 + ... + 10184025.

It is an arithmetic number, because the mean of its divisors is an integer number (27315289020).

Almost surely, 2^218400221922 is an apocalyptic number.

218400221922 is an abundant number, since it is smaller than the sum of its proper divisors (218644402398).

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

218400221922 is a wasteful number, since it uses less digits than its factorization.

218400221922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20348377.

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 218400221922 in words is "two hundred eighteen billion, four hundred million, two hundred twenty-one thousand, nine hundred twenty-two".