20020422420 has 72 divisors (see below), whose sum is σ = 60740283240. Its totient is φ = 5337753600.

The previous prime is 20020422391. The next prime is 20020422481. The reversal of 20020422420 is 2422402002.

20020422420 is a `hidden beast` number, since 20 + 0 + 204 + 22 + 420 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1455269904 + 18565152516 = 38148^2 + 136254^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20020422393 and 20020422402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1608220 + ... + 1620620.

It is an arithmetic number, because the mean of its divisors is an integer number (843615045).

Almost surely, 2^20020422420 is an apocalyptic number.

20020422420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020422420 is an abundant number, since it is smaller than the sum of its proper divisors (40719860820).

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

20020422420 is a wasteful number, since it uses less digits than its factorization.

20020422420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21385 (or 21380 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20020422420 its reverse (2422402002), we get a palindrome (22442824422).

The spelling of 20020422420 in words is "twenty billion, twenty million, four hundred twenty-two thousand, four hundred twenty".