20240400440420 has 48 divisors (see below), whose sum is σ = 42951876240000. Its totient is φ = 8011136480256.

The previous prime is 20240400440413. The next prime is 20240400440431. The reversal of 20240400440420 is 2404400404202.

It is a self number, because there is not a number n which added to its sum of digits gives 20240400440420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1360382 + ... + 6506261.

It is an arithmetic number, because the mean of its divisors is an integer number (894830755000).

Almost surely, 2^{20240400440420} is an apocalyptic number.

20240400440420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20240400440420 is an abundant number, since it is smaller than the sum of its proper divisors (22711475799580).

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

20240400440420 is a wasteful number, since it uses less digits than its factorization.

20240400440420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7868004 (or 7868002 counting only the distinct ones).

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

Adding to 20240400440420 its reverse (2404400404202), we get a palindrome (22644800844622).

The spelling of 20240400440420 in words is "twenty trillion, two hundred forty billion, four hundred million, four hundred forty thousand, four hundred twenty".