993993018 has 64 divisors (see below), whose sum is σ = 2128896000. Its totient is φ = 308505024.

The previous prime is 993993017. The next prime is 993993101. The reversal of 993993018 is 810399399.

It is not an unprimeable number, because it can be changed into a prime (993993017) 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 in 31 ways as a sum of consecutive naturals, for example, 2074903 + ... + 2075381.

It is an arithmetic number, because the mean of its divisors is an integer number (33264000).

Almost surely, 2^993993018 is an apocalyptic number.

993993018 is an abundant number, since it is smaller than the sum of its proper divisors (1134902982).

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

993993018 is a wasteful number, since it uses less digits than its factorization.

993993018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779.

The product of its (nonzero) digits is 472392, while the sum is 51.

The square root of 993993018 is about 31527.6548128782. The cubic root of 993993018 is about 997.9936499182.

The spelling of 993993018 in words is "nine hundred ninety-three million, nine hundred ninety-three thousand, eighteen".