2163312818 has 16 divisors (see below), whose sum is σ = 3367039704. Its totient is φ = 1041569280.

The previous prime is 2163312779. The next prime is 2163312829. The reversal of 2163312818 is 8182133612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2148971449 + 14341369 = 46357^2 + 3787^2 .

It is a super-2 number, since 2×2163312818² = 9359844697046202248, which contains 22 as substring.

It is a Curzon 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, 143513 + ... + 157868.

Almost surely, 2^2163312818 is an apocalyptic number.

2163312818 is a deficient number, since it is larger than the sum of its proper divisors (1203726886).

2163312818 is a wasteful number, since it uses less digits than its factorization.

2163312818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301517.

The product of its digits is 13824, while the sum is 35.

The square root of 2163312818 is about 46511.4267465534. The cubic root of 2163312818 is about 1293.3213329356.

The spelling of 2163312818 in words is "two billion, one hundred sixty-three million, three hundred twelve thousand, eight hundred eighteen".