2106571218 has 16 divisors (see below), whose sum is σ = 4460974560. Its totient is φ = 660885056.

The previous prime is 2106571217. The next prime is 2106571237. The reversal of 2106571218 is 8121756012.

It is not an unprimeable number, because it can be changed into a prime (2106571217) 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, 10326228 + ... + 10326431.

It is an arithmetic number, because the mean of its divisors is an integer number (278810910).

Almost surely, 2^2106571218 is an apocalyptic number.

2106571218 is an abundant number, since it is smaller than the sum of its proper divisors (2354403342).

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

2106571218 is a wasteful number, since it uses less digits than its factorization.

2106571218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20652681.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 2106571218 is about 45897.3988151834. The cubic root of 2106571218 is about 1281.9134829007.

The spelling of 2106571218 in words is "two billion, one hundred six million, five hundred seventy-one thousand, two hundred eighteen".