20420202240020 has 96 divisors (see below), whose sum is σ = 49636053089280. Its totient is φ = 6974141450240.

The previous prime is 20420202240007. The next prime is 20420202240133. The reversal of 20420202240020 is 2004220202402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20420202239974 and 20420202240001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3907859 + ... + 7490778.

It is an arithmetic number, because the mean of its divisors is an integer number (517042219680).

Almost surely, 2^{20420202240020} is an apocalyptic number.

20420202240020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420202240020 is an abundant number, since it is smaller than the sum of its proper divisors (29215850849260).

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

20420202240020 is a wasteful number, since it uses less digits than its factorization.

20420202240020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11399153 (or 11399151 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20420202240020 its reverse (2004220202402), we get a palindrome (22424422442422).

The spelling of 20420202240020 in words is "twenty trillion, four hundred twenty billion, two hundred two million, two hundred forty thousand, twenty".