404011332020 has 24 divisors (see below), whose sum is σ = 849314103624. Its totient is φ = 161434950656.

The previous prime is 404011331951. The next prime is 404011332029. The reversal of 404011332020 is 20233110404.

It can be written as a sum of positive squares in 4 ways, for example, as 156686138896 + 247325193124 = 395836^2 + 497318^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 404011331983 and 404011332001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404011332029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10579349 + ... + 10617468.

It is an arithmetic number, because the mean of its divisors is an integer number (35388087651).

Almost surely, 2^404011332020 is an apocalyptic number.

It is an amenable number.

404011332020 is an abundant number, since it is smaller than the sum of its proper divisors (445302771604).

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

404011332020 is a wasteful number, since it uses less digits than its factorization.

404011332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21197779 (or 21197777 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 404011332020 its reverse (20233110404), we get a palindrome (424244442424).

The spelling of 404011332020 in words is "four hundred four billion, eleven million, three hundred thirty-two thousand, twenty".