18900222120212 has 24 divisors (see below), whose sum is σ = 33099824742600. Its totient is φ = 9443130996096.

The previous prime is 18900222120191. The next prime is 18900222120301. The reversal of 18900222120212 is 21202122200981.

It can be written as a sum of positive squares in 4 ways, for example, as 1064499808516 + 17835722311696 = 1031746^2 + 4223236^2 .

It is a congruent number.

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, 46313714 + ... + 46720022.

It is an arithmetic number, because the mean of its divisors is an integer number (1379159364275).

Almost surely, 2^{18900222120212} is an apocalyptic number.

It is an amenable number.

18900222120212 is a deficient number, since it is larger than the sum of its proper divisors (14199602622388).

18900222120212 is a wasteful number, since it uses less digits than its factorization.

18900222120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414875 (or 414873 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 18900222120212 in words is "eighteen trillion, nine hundred billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twelve".