421404203220 has 288 divisors, whose sum is σ = 1612535734656. Its totient is φ = 80828697600.

The previous prime is 421404203179. The next prime is 421404203237. The reversal of 421404203220 is 22302404124.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 80751 + ... + 921590.

It is an arithmetic number, because the mean of its divisors is an integer number (5599082412).

Almost surely, 2^421404203220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421404203220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (806267867328).

421404203220 is an abundant number, since it is smaller than the sum of its proper divisors (1191131531436).

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

421404203220 is a wasteful number, since it uses less digits than its factorization.

421404203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002391 (or 1002382 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 421404203220 its reverse (22302404124), we get a palindrome (443706607344).

The spelling of 421404203220 in words is "four hundred twenty-one billion, four hundred four million, two hundred three thousand, two hundred twenty".