2173863318 has 64 divisors (see below), whose sum is σ = 4805885952. Its totient is φ = 650069280.

The previous prime is 2173863311. The next prime is 2173863347. The reversal of 2173863318 is 8133683712.

It is a self number, because there is not a number n which added to its sum of digits gives 2173863318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173863311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1868605 + ... + 1869767.

It is an arithmetic number, because the mean of its divisors is an integer number (75091968).

Almost surely, 2^2173863318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2173863318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2402942976).

2173863318 is an abundant number, since it is smaller than the sum of its proper divisors (2632022634).

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

2173863318 is a wasteful number, since it uses less digits than its factorization.

2173863318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529.

The product of its digits is 145152, while the sum is 42.

The square root of 2173863318 is about 46624.7071626193. The cubic root of 2173863318 is about 1295.4204382127.

The spelling of 2173863318 in words is "two billion, one hundred seventy-three million, eight hundred sixty-three thousand, three hundred eighteen".