4020022420 has 24 divisors (see below), whose sum is σ = 8464695624. Its totient is φ = 1603694976.

The previous prime is 4020022417. The next prime is 4020022423. The reversal of 4020022420 is 242200204.

It is an interprime number because it is at equal distance from previous prime (4020022417) and next prime (4020022423).

It can be written as a sum of positive squares in 4 ways, for example, as 1752929424 + 2267092996 = 41868^2 + 47614^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4020022394 and 4020022403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020022423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261979 + ... + 276898.

It is an arithmetic number, because the mean of its divisors is an integer number (352695651).

Almost surely, 2^4020022420 is an apocalyptic number.

It is an amenable number.

4020022420 is an abundant number, since it is smaller than the sum of its proper divisors (4444673204).

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

4020022420 is a wasteful number, since it uses less digits than its factorization.

4020022420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539259 (or 539257 counting only the distinct ones).

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

The square root of 4020022420 is about 63403.6467405464. The cubic root of 4020022420 is about 1590.0452790924.

Adding to 4020022420 its reverse (242200204), we get a palindrome (4262222624).

The spelling of 4020022420 in words is "four billion, twenty million, twenty-two thousand, four hundred twenty".