1945206818 has 8 divisors (see below), whose sum is σ = 2918965248. Its totient is φ = 972218404.

The previous prime is 1945206751. The next prime is 1945206869. The reversal of 1945206818 is 8186025491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186146 + ... + 196317.

It is an arithmetic number, because the mean of its divisors is an integer number (364870656).

Almost surely, 2^1945206818 is an apocalyptic number.

1945206818 is a deficient number, since it is larger than the sum of its proper divisors (973758430).

1945206818 is a wasteful number, since it uses less digits than its factorization.

1945206818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385008.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 1945206818 is about 44104.4988408212. The cubic root of 1945206818 is about 1248.3084999345.

The spelling of 1945206818 in words is "one billion, nine hundred forty-five million, two hundred six thousand, eight hundred eighteen".