1995743818 has 8 divisors (see below), whose sum is σ = 3004745220. Its totient is φ = 994162080.

The previous prime is 1995743803. The next prime is 1995743819. The reversal of 1995743818 is 8183475991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1573153569 + 422590249 = 39663^2 + 20557^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1995743819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1854243 + ... + 1855318.

Almost surely, 2^1995743818 is an apocalyptic number.

1995743818 is a deficient number, since it is larger than the sum of its proper divisors (1009001402).

1995743818 is a wasteful number, since it uses less digits than its factorization.

1995743818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709832.

The product of its digits is 2177280, while the sum is 55.

The square root of 1995743818 is about 44673.7486450376. The cubic root of 1995743818 is about 1259.0266729403.

The spelling of 1995743818 in words is "one billion, nine hundred ninety-five million, seven hundred forty-three thousand, eight hundred eighteen".