20210420040404 has 48 divisors (see below), whose sum is σ = 42014732356800. Its totient is φ = 8402946451200.

The previous prime is 20210420040403. The next prime is 20210420040409. The reversal of 20210420040404 is 40404002401202.

It is a super-3 number, since 3×20210420040404³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 20210420040404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210420040403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416788577 + ... + 416837064.

It is an arithmetic number, because the mean of its divisors is an integer number (875306924100).

Almost surely, 2^{20210420040404} is an apocalyptic number.

It is an amenable number.

20210420040404 is an abundant number, since it is smaller than the sum of its proper divisors (21804312316396).

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

20210420040404 is a wasteful number, since it uses less digits than its factorization.

20210420040404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833625704 (or 833625702 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 20210420040404 its reverse (40404002401202), we get a palindrome (60614422441606).

The spelling of 20210420040404 in words is "twenty trillion, two hundred ten billion, four hundred twenty million, forty thousand, four hundred four".