4018385813 has 8 divisors (see below), whose sum is σ = 4386774168. Its totient is φ = 3658466304.

The previous prime is 4018385809. The next prime is 4018385843. The reversal of 4018385813 is 3185838104.

It can be written as a sum of positive squares in 4 ways, for example, as 11242609 + 4007143204 = 3353^2 + 63302^2 .

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 4018385813 - 2² = 4018385809 is a prime.

It is a super-2 number, since 2×4018385813² = 32294849084239341938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4018385843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2116220 + ... + 2118117.

It is an arithmetic number, because the mean of its divisors is an integer number (548346771).

Almost surely, 2^4018385813 is an apocalyptic number.

It is an amenable number.

4018385813 is a deficient number, since it is larger than the sum of its proper divisors (368388355).

4018385813 is a wasteful number, since it uses less digits than its factorization.

4018385813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234423.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 4018385813 is about 63390.7391737941. The cubic root of 4018385813 is about 1589.8294732930.

The spelling of 4018385813 in words is "four billion, eighteen million, three hundred eighty-five thousand, eight hundred thirteen".