200404400020 has 48 divisors (see below), whose sum is σ = 459326605248. Its totient is φ = 72839669760.

The previous prime is 200404400011. The next prime is 200404400041. The reversal of 200404400020 is 20004404002.

It is a junction number, because it is equal to n+sod(n) for n = 200404399967 and 200404400003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249307 + ... + 680413.

It is an arithmetic number, because the mean of its divisors is an integer number (9569304276).

Almost surely, 2^200404400020 is an apocalyptic number.

200404400020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200404400020 is an abundant number, since it is smaller than the sum of its proper divisors (258922205228).

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

200404400020 is a wasteful number, since it uses less digits than its factorization.

200404400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433240 (or 433238 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 200404400020 its reverse (20004404002), we get a palindrome (220408804022).

The spelling of 200404400020 in words is "two hundred billion, four hundred four million, four hundred thousand, twenty".