404213020420 has 96 divisors (see below), whose sum is σ = 933185949696. Its totient is φ = 145850544000.

The previous prime is 404213020417. The next prime is 404213020429. The reversal of 404213020420 is 24020312404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 404213020391 and 404213020400.

It is not an unprimeable number, because it can be changed into a prime (404213020429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32117449 + ... + 32130031.

It is an arithmetic number, because the mean of its divisors is an integer number (9720686976).

Almost surely, 2^404213020420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404213020420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (466592974848).

404213020420 is an abundant number, since it is smaller than the sum of its proper divisors (528972929276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404213020420 is a wasteful number, since it uses less digits than its factorization.

404213020420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13721 (or 13719 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 404213020420 its reverse (24020312404), we get a palindrome (428233332824).

The spelling of 404213020420 in words is "four hundred four billion, two hundred thirteen million, twenty thousand, four hundred twenty".