1868493996 has 18 divisors (see below), whose sum is σ = 4723137692. Its totient is φ = 622831320.

The previous prime is 1868493889. The next prime is 1868494009. The reversal of 1868493996 is 6993948681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25951270 + ... + 25951341.

Almost surely, 2^1868493996 is an apocalyptic number.

It is an amenable number.

1868493996 is an abundant number, since it is smaller than the sum of its proper divisors (2854643696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1868493996 is a wasteful number, since it uses less digits than its factorization.

1868493996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51902621 (or 51902616 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The square root of 1868493996 is about 43226.0800443436. The cubic root of 1868493996 is about 1231.6781456356.

The spelling of 1868493996 in words is "one billion, eight hundred sixty-eight million, four hundred ninety-three thousand, nine hundred ninety-six".