20404302240020 has 24 divisors (see below), whose sum is σ = 42922031380704. Its totient is φ = 8147816767136.

The previous prime is 20404302240017. The next prime is 20404302240029. The reversal of 20404302240020 is 2004220340402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404302240029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868996022 + ... + 869019501.

It is an arithmetic number, because the mean of its divisors is an integer number (1788417974196).

Almost surely, 2^{20404302240020} is an apocalyptic number.

20404302240020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404302240020 is an abundant number, since it is smaller than the sum of its proper divisors (22517729140684).

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

20404302240020 is a wasteful number, since it uses less digits than its factorization.

20404302240020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738016119 (or 1738016117 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 20404302240020 its reverse (2004220340402), we get a palindrome (22408522580422).

The spelling of 20404302240020 in words is "twenty trillion, four hundred four billion, three hundred two million, two hundred forty thousand, twenty".