20404200420216 has 48 divisors (see below), whose sum is σ = 56167300349160. Its totient is φ = 6689901775680.

The previous prime is 20404200420209. The next prime is 20404200420257. The reversal of 20404200420216 is 61202400240402.

20404200420216 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 4 + 20 + 0 + 420 + 216 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20404200420216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2322878170 + ... + 2322886953.

Almost surely, 2^{20404200420216} is an apocalyptic number.

It is an amenable number.

20404200420216 is an abundant number, since it is smaller than the sum of its proper divisors (35763099928944).

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

20404200420216 is a wasteful number, since it uses less digits than its factorization.

20404200420216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645765196 (or 4645765189 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 20404200420216 its reverse (61202400240402), we get a palindrome (81606600660618).

The spelling of 20404200420216 in words is "twenty trillion, four hundred four billion, two hundred million, four hundred twenty thousand, two hundred sixteen".