20220442420 has 24 divisors (see below), whose sum is σ = 42495874848. Its totient is φ = 8081901600.

The previous prime is 20220442381. The next prime is 20220442471. The reversal of 20220442420 is 2424402202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20220442391 and 20220442400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365746 + ... + 417385.

It is an arithmetic number, because the mean of its divisors is an integer number (1770661452).

Almost surely, 2^20220442420 is an apocalyptic number.

20220442420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220442420 is an abundant number, since it is smaller than the sum of its proper divisors (22275432428).

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

20220442420 is a wasteful number, since it uses less digits than its factorization.

20220442420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784431 (or 784429 counting only the distinct ones).

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

Adding to 20220442420 its reverse (2424402202), we get a palindrome (22644844622).

The spelling of 20220442420 in words is "twenty billion, two hundred twenty million, four hundred forty-two thousand, four hundred twenty".