2018244649 has 4 divisors (see below), whose sum is σ = 2024061264. Its totient is φ = 2012428036.

The previous prime is 2018244617. The next prime is 2018244691. The reversal of 2018244649 is 9464428102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2018244649 - 2⁵ = 2018244617 is a prime.

It is a super-2 number, since 2×2018244649² = 8146622926434266402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028244649) 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, 2907787 + ... + 2908480.

It is an arithmetic number, because the mean of its divisors is an integer number (506015316).

Almost surely, 2^2018244649 is an apocalyptic number.

It is an amenable number.

2018244649 is a deficient number, since it is larger than the sum of its proper divisors (5816615).

2018244649 is an equidigital number, since it uses as much as digits as its factorization.

2018244649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5816614.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 2018244649 is about 44924.8778406798. The cubic root of 2018244649 is about 1263.7405951759.

The spelling of 2018244649 in words is "two billion, eighteen million, two hundred forty-four thousand, six hundred forty-nine".