2170218668386 has 16 divisors (see below), whose sum is σ = 3279219572736. Its totient is φ = 1077146106016.

The previous prime is 2170218668383. The next prime is 2170218668419. The reversal of 2170218668386 is 6838668120712.

It is a happy number.

It is a super-2 number, since 2×2170218668386² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2170218668386.

It is not an unprimeable number, because it can be changed into a prime (2170218668383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7432035 + ... + 7718521.

It is an arithmetic number, because the mean of its divisors is an integer number (204951223296).

Almost surely, 2^{2170218668386} is an apocalyptic number.

2170218668386 is a deficient number, since it is larger than the sum of its proper divisors (1109000904350).

2170218668386 is a wasteful number, since it uses less digits than its factorization.

2170218668386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314273.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 2170218668386 in words is "two trillion, one hundred seventy billion, two hundred eighteen million, six hundred sixty-eight thousand, three hundred eighty-six".