20044040240420 has 48 divisors (see below), whose sum is σ = 48112552575360. Its totient is φ = 6871262939904.

The previous prime is 20044040240383. The next prime is 20044040240423. The reversal of 20044040240420 is 2404204044002.

It is a self number, because there is not a number n which added to its sum of digits gives 20044040240420.

It is not an unprimeable number, because it can be changed into a prime (20044040240423) 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, 9216209 + ... + 11181528.

It is an arithmetic number, because the mean of its divisors is an integer number (1002344845320).

Almost surely, 2^{20044040240420} is an apocalyptic number.

20044040240420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20044040240420 is an abundant number, since it is smaller than the sum of its proper divisors (28068512334940).

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

20044040240420 is a wasteful number, since it uses less digits than its factorization.

20044040240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20404772 (or 20404770 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 20044040240420 its reverse (2404204044002), we get a palindrome (22448244284422).

The spelling of 20044040240420 in words is "twenty trillion, forty-four billion, forty million, two hundred forty thousand, four hundred twenty".