4818331993 has 4 divisors (see below), whose sum is σ = 4948557220. Its totient is φ = 4688106768.

The previous prime is 4818331963. The next prime is 4818332003. The reversal of 4818331993 is 3991338184.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4494763849 + 323568144 = 67043^2 + 17988^2 .

It is a cyclic number.

It is not a de Polignac number, because 4818331993 - 2⁹ = 4818331481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4818331943) 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, 65112558 + ... + 65112631.

It is an arithmetic number, because the mean of its divisors is an integer number (1237139305).

Almost surely, 2^4818331993 is an apocalyptic number.

It is an amenable number.

4818331993 is a deficient number, since it is larger than the sum of its proper divisors (130225227).

4818331993 is a wasteful number, since it uses less digits than its factorization.

4818331993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130225226.

The product of its digits is 559872, while the sum is 49.

The square root of 4818331993 is about 69414.2059883998. The cubic root of 4818331993 is about 1689.0100749992.

The spelling of 4818331993 in words is "four billion, eight hundred eighteen million, three hundred thirty-one thousand, nine hundred ninety-three".