1994442418 has 4 divisors (see below), whose sum is σ = 2991663630. Its totient is φ = 997221208.

The previous prime is 1994442403. The next prime is 1994442419. The reversal of 1994442418 is 8142444991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1846163089 + 148279329 = 42967^2 + 12177^2 .

It is not an unprimeable number, because it can be changed into a prime (1994442419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498610603 + ... + 498610606.

Almost surely, 2^1994442418 is an apocalyptic number.

1994442418 is a deficient number, since it is larger than the sum of its proper divisors (997221212).

1994442418 is an equidigital number, since it uses as much as digits as its factorization.

1994442418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997221211.

The product of its digits is 331776, while the sum is 46.

The square root of 1994442418 is about 44659.1806687046. The cubic root of 1994442418 is about 1258.7529481642.

The spelling of 1994442418 in words is "one billion, nine hundred ninety-four million, four hundred forty-two thousand, four hundred eighteen".