404001202020 has 48 divisors (see below), whose sum is σ = 1218219011520. Its totient is φ = 99446449536.

The previous prime is 404001201991. The next prime is 404001202027. The reversal of 404001202020 is 20202100404.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (404001202027) 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, 258974350 + ... + 258975909.

It is an arithmetic number, because the mean of its divisors is an integer number (25379562740).

Almost surely, 2^404001202020 is an apocalyptic number.

It is an amenable number.

404001202020 is an abundant number, since it is smaller than the sum of its proper divisors (814217809500).

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

404001202020 is a wasteful number, since it uses less digits than its factorization.

404001202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517950284 (or 517950282 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 404001202020 its reverse (20202100404), we get a palindrome (424203302424).

The spelling of 404001202020 in words is "four hundred four billion, one million, two hundred two thousand, twenty".