20204004400420 has 12 divisors (see below), whose sum is σ = 42428409240924. Its totient is φ = 8081601760160.

The previous prime is 20204004400417. The next prime is 20204004400427. The reversal of 20204004400420 is 2400440040202.

It can be written as a sum of positive squares in 2 ways, for example, as 6019259882724 + 14184744517696 = 2453418^2 + 3766264^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20204004400391 and 20204004400400.

It is not an unprimeable number, because it can be changed into a prime (20204004400427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505100109991 + ... + 505100110030.

It is an arithmetic number, because the mean of its divisors is an integer number (3535700770077).

Almost surely, 2^{20204004400420} is an apocalyptic number.

20204004400420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20204004400420 is an abundant number, since it is smaller than the sum of its proper divisors (22224404840504).

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

20204004400420 is a wasteful number, since it uses less digits than its factorization.

20204004400420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010200220030 (or 1010200220028 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20204004400420 its reverse (2400440040202), we get a palindrome (22604444440622).

The spelling of 20204004400420 in words is "twenty trillion, two hundred four billion, four million, four hundred thousand, four hundred twenty".