2018403821 has 16 divisors (see below), whose sum is σ = 2324096640. Its totient is φ = 1717087680.

The previous prime is 2018403817. The next prime is 2018403841. The reversal of 2018403821 is 1283048102.

It is not a de Polignac number, because 2018403821 - 2² = 2018403817 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 (2018403841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 827015 + ... + 829451.

It is an arithmetic number, because the mean of its divisors is an integer number (145256040).

Almost surely, 2^2018403821 is an apocalyptic number.

It is an amenable number.

2018403821 is a deficient number, since it is larger than the sum of its proper divisors (305692819).

2018403821 is a wasteful number, since it uses less digits than its factorization.

2018403821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 2018403821 is about 44926.6493408979. The cubic root of 2018403821 is about 1263.7738165911.

The spelling of 2018403821 in words is "two billion, eighteen million, four hundred three thousand, eight hundred twenty-one".