20420425015122 has 32 divisors (see below), whose sum is σ = 45054257451840. Its totient is φ = 6118479403520.

The previous prime is 20420425015121. The next prime is 20420425015139. The reversal of 20420425015122 is 22151052402402.

It is a self number, because there is not a number n which added to its sum of digits gives 20420425015122.

It is not an unprimeable number, because it can be changed into a prime (20420425015121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1738198503 + ... + 1738210250.

It is an arithmetic number, because the mean of its divisors is an integer number (1407945545370).

Almost surely, 2^{20420425015122} is an apocalyptic number.

20420425015122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20420425015122 is an abundant number, since it is smaller than the sum of its proper divisors (24633832436718).

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

20420425015122 is a wasteful number, since it uses less digits than its factorization.

20420425015122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476408858.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 20420425015122 its reverse (22151052402402), we get a palindrome (42571477417524).

The spelling of 20420425015122 in words is "twenty trillion, four hundred twenty billion, four hundred twenty-five million, fifteen thousand, one hundred twenty-two".