20422402444242 has 72 divisors (see below), whose sum is σ = 46263971090064. Its totient is φ = 6510373298352.

The previous prime is 20422402444211. The next prime is 20422402444243. The reversal of 20422402444242 is 24244420422402.

20422402444242 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 2 + 402 + 4 + 4 + 4 + 242 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20422402444197 and 20422402444206.

It is not an unprimeable number, because it can be changed into a prime (20422402444243) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 56217753 + ... + 56579859.

Almost surely, 2^{20422402444242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20422402444242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23131985545032).

20422402444242 is an abundant number, since it is smaller than the sum of its proper divisors (25841568645822).

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

20422402444242 is a wasteful number, since it uses less digits than its factorization.

20422402444242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368084 (or 368058 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 36.

Adding to 20422402444242 its reverse (24244420422402), we get a palindrome (44666822866644).

The spelling of 20422402444242 in words is "twenty trillion, four hundred twenty-two billion, four hundred two million, four hundred forty-four thousand, two hundred forty-two".