2018393449 has 4 divisors (see below), whose sum is σ = 2019329620. Its totient is φ = 2017457280.

The previous prime is 2018393423. The next prime is 2018393453. The reversal of 2018393449 is 9443938102.

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 599515225 + 1418878224 = 24485^2 + 37668^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018393449 - 2²⁷ = 1884175721 is a prime.

It is a super-2 number, since 2×2018393449² = 8147824229932231202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018303449) 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 3 ways as a sum of consecutive naturals, for example, 464844 + ... + 469165.

It is an arithmetic number, because the mean of its divisors is an integer number (504832405).

Almost surely, 2^2018393449 is an apocalyptic number.

It is an amenable number.

2018393449 is a deficient number, since it is larger than the sum of its proper divisors (936171).

2018393449 is an equidigital number, since it uses as much as digits as its factorization.

2018393449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936170.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 2018393449 is about 44926.5339081483. The cubic root of 2018393449 is about 1263.7716518633.

The spelling of 2018393449 in words is "two billion, eighteen million, three hundred ninety-three thousand, four hundred forty-nine".