20784420404488 has 128 divisors (see below), whose sum is σ = 42855255273600. Its totient is φ = 9392791855104.

The previous prime is 20784420404483. The next prime is 20784420404593. The reversal of 20784420404488 is 88440402448702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20784420404483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355703931 + ... + 355762357.

It is an arithmetic number, because the mean of its divisors is an integer number (334806681825).

Almost surely, 2^{20784420404488} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20784420404488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21427627636800).

20784420404488 is an abundant number, since it is smaller than the sum of its proper divisors (22070834869112).

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

20784420404488 is a wasteful number, since it uses less digits than its factorization.

20784420404488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58919 (or 58915 counting only the distinct ones).

The product of its (nonzero) digits is 14680064, while the sum is 55.

The spelling of 20784420404488 in words is "twenty trillion, seven hundred eighty-four billion, four hundred twenty million, four hundred four thousand, four hundred eighty-eight".