3818403821 has 8 divisors (see below), whose sum is σ = 3835036800. Its totient is φ = 3801790080.

The previous prime is 3818403803. The next prime is 3818403839. The reversal of 3818403821 is 1283048183.

It is an interprime number because it is at equal distance from previous prime (3818403803) and next prime (3818403839).

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 3818403821 - 2¹⁴ = 3818387437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818403221) 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, 508190 + ... + 515648.

It is an arithmetic number, because the mean of its divisors is an integer number (479379600).

Almost surely, 2^3818403821 is an apocalyptic number.

It is an amenable number.

3818403821 is a deficient number, since it is larger than the sum of its proper divisors (16632979).

3818403821 is a wasteful number, since it uses less digits than its factorization.

3818403821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9619.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 3818403821 is about 61793.2344274031. The cubic root of 3818403821 is about 1563.0059045416.

The spelling of 3818403821 in words is "three billion, eight hundred eighteen million, four hundred three thousand, eight hundred twenty-one".