404053320021 has 32 divisors (see below), whose sum is σ = 586040095872. Its totient is φ = 246137337600.

The previous prime is 404053320017. The next prime is 404053320029. The reversal of 404053320021 is 120023350404.

It is not a de Polignac number, because 404053320021 - 2² = 404053320017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 404053319973 and 404053320000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404053320029) 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 31 ways as a sum of consecutive naturals, for example, 35181346 + ... + 35192828.

It is an arithmetic number, because the mean of its divisors is an integer number (18313752996).

Almost surely, 2^404053320021 is an apocalyptic number.

It is an amenable number.

404053320021 is a deficient number, since it is larger than the sum of its proper divisors (181986775851).

404053320021 is a wasteful number, since it uses less digits than its factorization.

404053320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20533.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 404053320021 its reverse (120023350404), we get a palindrome (524076670425).

The spelling of 404053320021 in words is "four hundred four billion, fifty-three million, three hundred twenty thousand, twenty-one".