18920222120212 has 12 divisors (see below), whose sum is σ = 37840444240480. Its totient is φ = 8108666622936.

The previous prime is 18920222120179. The next prime is 18920222120221. The reversal of 18920222120212 is 21202122202981.

It is a happy number.

18920222120212 is an admirable number.

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, 337861109262 + ... + 337861109317.

Almost surely, 2^{18920222120212} is an apocalyptic number.

It is an amenable number.

18920222120212 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.

18920222120212 is a wasteful number, since it uses less digits than its factorization.

18920222120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675722218590 (or 675722218588 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 18920222120212 in words is "eighteen trillion, nine hundred twenty billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twelve".