404413202021 has 8 divisors (see below), whose sum is σ = 409965060120. Its totient is φ = 398861667072.

The previous prime is 404413201987. The next prime is 404413202027. The reversal of 404413202021 is 120202314404.

It can be written as a sum of positive squares in 4 ways, for example, as 86576589121 + 317836612900 = 294239^2 + 563770^2 .

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 404413202021 - 2³⁰ = 403339460197 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 (404413202027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3552575 + ... + 3664643.

It is an arithmetic number, because the mean of its divisors is an integer number (51245632515).

Almost surely, 2^404413202021 is an apocalyptic number.

It is an amenable number.

404413202021 is a deficient number, since it is larger than the sum of its proper divisors (5551858099).

404413202021 is a wasteful number, since it uses less digits than its factorization.

404413202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161575.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 404413202021 its reverse (120202314404), we get a palindrome (524615516425).

The spelling of 404413202021 in words is "four hundred four billion, four hundred thirteen million, two hundred two thousand, twenty-one".