194685390218 has 32 divisors (see below), whose sum is σ = 328998799872. Its totient is φ = 85600699200.

The previous prime is 194685390217. The next prime is 194685390233. The reversal of 194685390218 is 812093586491.

It is not an unprimeable number, because it can be changed into a prime (194685390217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1501580 + ... + 1626072.

It is an arithmetic number, because the mean of its divisors is an integer number (10281212496).

Almost surely, 2^194685390218 is an apocalyptic number.

194685390218 is a deficient number, since it is larger than the sum of its proper divisors (134313409654).

194685390218 is a wasteful number, since it uses less digits than its factorization.

194685390218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126830.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 194685390218 in words is "one hundred ninety-four billion, six hundred eighty-five million, three hundred ninety thousand, two hundred eighteen".