420420204020 has 48 divisors (see below), whose sum is σ = 886782484560. Its totient is φ = 167426528256.

The previous prime is 420420203999. The next prime is 420420204049. The reversal of 420420204020 is 20402024024.

It can be written as a sum of positive squares in 8 ways, for example, as 170887984996 + 249532219024 = 413386^2 + 499532^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 420420203983 and 420420204001.

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, 5149034 + ... + 5230046.

It is an arithmetic number, because the mean of its divisors is an integer number (18474635095).

Almost surely, 2^420420204020 is an apocalyptic number.

It is an amenable number.

420420204020 is an abundant number, since it is smaller than the sum of its proper divisors (466362280540).

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

420420204020 is a wasteful number, since it uses less digits than its factorization.

420420204020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82164 (or 82162 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 420420204020 its reverse (20402024024), we get a palindrome (440822228044).

The spelling of 420420204020 in words is "four hundred twenty billion, four hundred twenty million, two hundred four thousand, twenty".