194797018 has 16 divisors (see below), whose sum is σ = 316055880. Its totient is φ = 89510976.

The previous prime is 194797013. The next prime is 194797019. The reversal of 194797018 is 810797491.

It can be written as a sum of positive squares in 4 ways, for example, as 193571569 + 1225449 = 13913^2 + 1107^2 .

It is not an unprimeable number, because it can be changed into a prime (194797013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10405 + ... + 22312.

Almost surely, 2^194797018 is an apocalyptic number.

194797018 is a deficient number, since it is larger than the sum of its proper divisors (121258862).

194797018 is a wasteful number, since it uses less digits than its factorization.

194797018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32961.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 194797018 is about 13956.9702299604. The cubic root of 194797018 is about 579.6877213131.

The spelling of 194797018 in words is "one hundred ninety-four million, seven hundred ninety-seven thousand, eighteen".