4018163821 has 4 divisors (see below), whose sum is σ = 4592187232. Its totient is φ = 3444140412.

The previous prime is 4018163819. The next prime is 4018163861. The reversal of 4018163821 is 1283618104.

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 4018163821 - 2¹ = 4018163819 is a prime.

It is a super-2 number, since 2×4018163821² = 32291280984786640082, 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 (4018163861) 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, 287011695 + ... + 287011708.

It is an arithmetic number, because the mean of its divisors is an integer number (1148046808).

Almost surely, 2^4018163821 is an apocalyptic number.

It is an amenable number.

4018163821 is a deficient number, since it is larger than the sum of its proper divisors (574023411).

4018163821 is an equidigital number, since it uses as much as digits as its factorization.

4018163821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574023410.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 4018163821 is about 63388.9881682931. The cubic root of 4018163821 is about 1589.8001965353.

The spelling of 4018163821 in words is "four billion, eighteen million, one hundred sixty-three thousand, eight hundred twenty-one".