420002444020 has 12 divisors (see below), whose sum is σ = 882005132484. Its totient is φ = 168000977600.

The previous prime is 420002443997. The next prime is 420002444027. The reversal of 420002444020 is 20444200024.

It can be written as a sum of positive squares in 2 ways, for example, as 167650940304 + 252351503716 = 409452^2 + 502346^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420002443982 and 420002444000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420002444027) 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, 10500061081 + ... + 10500061120.

It is an arithmetic number, because the mean of its divisors is an integer number (73500427707).

Almost surely, 2^420002444020 is an apocalyptic number.

It is an amenable number.

420002444020 is an abundant number, since it is smaller than the sum of its proper divisors (462002688464).

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

420002444020 is a wasteful number, since it uses less digits than its factorization.

420002444020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21000122210 (or 21000122208 counting only the distinct ones).

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

Adding to 420002444020 its reverse (20444200024), we get a palindrome (440446644044).

The spelling of 420002444020 in words is "four hundred twenty billion, two million, four hundred forty-four thousand, twenty".