4218385813 has 4 divisors (see below), whose sum is σ = 4219054720. Its totient is φ = 4217716908.

The previous prime is 4218385807. The next prime is 4218385837. The reversal of 4218385813 is 3185838124.

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 4218385813 - 2⁵ = 4218385781 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 4218385813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4218385883) 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, 324903 + ... + 337636.

It is an arithmetic number, because the mean of its divisors is an integer number (1054763680).

Almost surely, 2^4218385813 is an apocalyptic number.

It is an amenable number.

4218385813 is a deficient number, since it is larger than the sum of its proper divisors (668907).

4218385813 is an equidigital number, since it uses as much as digits as its factorization.

4218385813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668906.

The product of its digits is 184320, while the sum is 43.

The square root of 4218385813 is about 64949.1017104933. The cubic root of 4218385813 is about 1615.7795203574.

The spelling of 4218385813 in words is "four billion, two hundred eighteen million, three hundred eighty-five thousand, eight hundred thirteen".