216162018 has 24 divisors (see below), whose sum is σ = 472992156. Its totient is φ = 71340000.

The previous prime is 216162007. The next prime is 216162019. The reversal of 216162018 is 810261612.

216162018 is a `hidden beast` number, since 21 + 6 + 1 + 620 + 18 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 204690249 + 11471769 = 14307^2 + 3387^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216161982 and 216162000.

It is not an unprimeable number, because it can be changed into a prime (216162019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57633 + ... + 61268.

Almost surely, 2^216162018 is an apocalyptic number.

216162018 is an abundant number, since it is smaller than the sum of its proper divisors (256830138).

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

216162018 is a wasteful number, since it uses less digits than its factorization.

216162018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119010 (or 119007 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 216162018 is about 14702.4493877721. The cubic root of 216162018 is about 600.1499791740.

The spelling of 216162018 in words is "two hundred sixteen million, one hundred sixty-two thousand, eighteen".