2018522993 has 8 divisors (see below), whose sum is σ = 2023580328. Its totient is φ = 2013473664.

The previous prime is 2018522977. The next prime is 2018523097. The reversal of 2018522993 is 3992258102.

It can be written as a sum of positive squares in 4 ways, for example, as 404331664 + 1614191329 = 20108^2 + 40177^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2018522993 - 2⁴ = 2018522977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2018522993.

It is not an unprimeable number, because it can be changed into a prime (2018522903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054205 + ... + 1056117.

It is an arithmetic number, because the mean of its divisors is an integer number (252947541).

Almost surely, 2^2018522993 is an apocalyptic number.

It is an amenable number.

2018522993 is a deficient number, since it is larger than the sum of its proper divisors (5057335).

2018522993 is a wasteful number, since it uses less digits than its factorization.

2018522993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 2018522993 is about 44927.9756165354. The cubic root of 2018522993 is about 1263.7986883053.

The spelling of 2018522993 in words is "two billion, eighteen million, five hundred twenty-two thousand, nine hundred ninety-three".