20340442122 has 128 divisors (see below), whose sum is σ = 54826426368. Its totient is φ = 4858444800.

The previous prime is 20340442121. The next prime is 20340442139. The reversal of 20340442122 is 22124404302.

It is a junction number, because it is equal to n+sod(n) for n = 20340442092 and 20340442101.

It is not an unprimeable number, because it can be changed into a prime (20340442121) 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 63 ways as a sum of consecutive naturals, for example, 1621378 + ... + 1633874.

It is an arithmetic number, because the mean of its divisors is an integer number (428331456).

Almost surely, 2^20340442122 is an apocalyptic number.

20340442122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20340442122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27413213184).

20340442122 is an abundant number, since it is smaller than the sum of its proper divisors (34485984246).

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

20340442122 is a wasteful number, since it uses less digits than its factorization.

20340442122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12804.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20340442122 its reverse (22124404302), we get a palindrome (42464846424).

The spelling of 20340442122 in words is "twenty billion, three hundred forty million, four hundred forty-two thousand, one hundred twenty-two".