20422402420 has 48 divisors (see below), whose sum is σ = 51144807168. Its totient is φ = 6697532160.

The previous prime is 20422402411. The next prime is 20422402421. The reversal of 20422402420 is 2420422402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20422402391 and 20422402400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422402421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3167961 + ... + 3174400.

It is an arithmetic number, because the mean of its divisors is an integer number (1065516816).

Almost surely, 2^20422402420 is an apocalyptic number.

20422402420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20422402420 is an abundant number, since it is smaller than the sum of its proper divisors (30722404748).

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

20422402420 is a wasteful number, since it uses less digits than its factorization.

20422402420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342400 (or 6342398 counting only the distinct ones).

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

Adding to 20422402420 its reverse (2420422402), we get a palindrome (22842824822).

The spelling of 20422402420 in words is "twenty billion, four hundred twenty-two million, four hundred two thousand, four hundred twenty".