2172959818 has 16 divisors (see below), whose sum is σ = 3366994176. Its totient is φ = 1050678720.

The previous prime is 2172959813. The next prime is 2172959851. The reversal of 2172959818 is 8189592712.

It is not an unprimeable number, because it can be changed into a prime (2172959813) 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, 80130 + ... + 103762.

It is an arithmetic number, because the mean of its divisors is an integer number (210437136).

Almost surely, 2^2172959818 is an apocalyptic number.

2172959818 is a deficient number, since it is larger than the sum of its proper divisors (1194034358).

2172959818 is a wasteful number, since it uses less digits than its factorization.

2172959818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25149.

The product of its digits is 725760, while the sum is 52.

The square root of 2172959818 is about 46615.0170867715. The cubic root of 2172959818 is about 1295.2409460090.

The spelling of 2172959818 in words is "two billion, one hundred seventy-two million, nine hundred fifty-nine thousand, eight hundred eighteen".