919190218 has 4 divisors (see below), whose sum is σ = 1378785330. Its totient is φ = 459595108.

The previous prime is 919190213. The next prime is 919190243. The reversal of 919190218 is 812091919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812091919 = 4679 ⋅173561.

It can be written as a sum of positive squares in only one way, i.e., 707400409 + 211789809 = 26597^2 + 14553^2 .

It is not an unprimeable number, because it can be changed into a prime (919190213) 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 as a sum of consecutive naturals, namely, 229797553 + ... + 229797556.

Almost surely, 2^919190218 is an apocalyptic number.

919190218 is a deficient number, since it is larger than the sum of its proper divisors (459595112).

919190218 is a wasteful number, since it uses less digits than its factorization.

919190218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459595111.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 919190218 is about 30318.1499765405. The cubic root of 919190218 is about 972.3033855976.

The spelling of 919190218 in words is "nine hundred nineteen million, one hundred ninety thousand, two hundred eighteen".