20420000422443 has 12 divisors (see below), whose sum is σ = 29506079054920. Its totient is φ = 13608476896896.

The previous prime is 20420000422439. The next prime is 20420000422469. The reversal of 20420000422443 is 34422400002402.

It is not a de Polignac number, because 20420000422443 - 2² = 20420000422439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20420000492443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404699878 + ... + 404750331.

Almost surely, 2^{20420000422443} is an apocalyptic number.

20420000422443 is a deficient number, since it is larger than the sum of its proper divisors (9086078632477).

20420000422443 is a wasteful number, since it uses less digits than its factorization.

20420000422443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809453018 (or 809453015 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 20420000422443 its reverse (34422400002402), we get a palindrome (54842400424845).

The spelling of 20420000422443 in words is "twenty trillion, four hundred twenty billion, four hundred twenty-two thousand, four hundred forty-three".