2018401689 has 8 divisors (see below), whose sum is σ = 2763937600. Its totient is φ = 1309233456.

The previous prime is 2018401667. The next prime is 2018401709. The reversal of 2018401689 is 9861048102.

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

It is not a de Polignac number, because 2018401689 - 2¹⁹ = 2017877401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018402689) 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 7 ways as a sum of consecutive naturals, for example, 9091789 + ... + 9092010.

It is an arithmetic number, because the mean of its divisors is an integer number (345492200).

Almost surely, 2^2018401689 is an apocalyptic number.

It is an amenable number.

2018401689 is a deficient number, since it is larger than the sum of its proper divisors (745535911).

2018401689 is a wasteful number, since it uses less digits than its factorization.

2018401689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18183839.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 2018401689 is about 44926.6256133264. The cubic root of 2018401689 is about 1263.7733716245.

The spelling of 2018401689 in words is "two billion, eighteen million, four hundred one thousand, six hundred eighty-nine".