420422020 has 12 divisors (see below), whose sum is σ = 882886284. Its totient is φ = 168168800.

The previous prime is 420421997. The next prime is 420422033. The reversal of 420422020 is 20224024.

It can be written as a sum of positive squares in 2 ways, for example, as 161340804 + 259081216 = 12702^2 + 16096^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420421985 and 420422003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10510531 + ... + 10510570.

It is an arithmetic number, because the mean of its divisors is an integer number (73573857).

Almost surely, 2^420422020 is an apocalyptic number.

It is an amenable number.

420422020 is an abundant number, since it is smaller than the sum of its proper divisors (462464264).

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

420422020 is a wasteful number, since it uses less digits than its factorization.

420422020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21021110 (or 21021108 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 420422020 is about 20504.1951804990. The cubic root of 420422020 is about 749.1379844333.

Adding to 420422020 its reverse (20224024), we get a palindrome (440646044).

The spelling of 420422020 in words is "four hundred twenty million, four hundred twenty-two thousand, twenty".