194802226218 has 24 divisors (see below), whose sum is σ = 422123984100. Its totient is φ = 64925999424.

The previous prime is 194802226163. The next prime is 194802226261. The reversal of 194802226218 is 812622208491.

194802226218 is a `hidden beast` number, since 19 + 4 + 8 + 0 + 2 + 2 + 2 + 621 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 189849304089 + 4952922129 = 435717^2 + 70377^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523353 + ... + 814556.

Almost surely, 2^194802226218 is an apocalyptic number.

194802226218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

194802226218 is an abundant number, since it is smaller than the sum of its proper divisors (227321757882).

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

194802226218 is a wasteful number, since it uses less digits than its factorization.

194802226218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346006 (or 1346003 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 194802226218 in words is "one hundred ninety-four billion, eight hundred two million, two hundred twenty-six thousand, two hundred eighteen".