993447018 has 80 divisors (see below), whose sum is σ = 2308610304. Its totient is φ = 318971520.

The previous prime is 993447001. The next prime is 993447029. The reversal of 993447018 is 810744399.

It is a Curzon number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 1692121 + ... + 1692707.

Almost surely, 2^993447018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 993447018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1154305152).

993447018 is an abundant number, since it is smaller than the sum of its proper divisors (1315163286).

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

993447018 is a wasteful number, since it uses less digits than its factorization.

993447018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 993447018 is about 31518.9945588371. The cubic root of 993447018 is about 997.8108839344.

The spelling of 993447018 in words is "nine hundred ninety-three million, four hundred forty-seven thousand, eighteen".