20440355525500 has 96 divisors (see below), whose sum is σ = 45408856147200. Its totient is φ = 8035852608000.

The previous prime is 20440355525459. The next prime is 20440355525563. The reversal of 20440355525500 is 552555304402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39054541 + ... + 39574459.

It is an arithmetic number, because the mean of its divisors is an integer number (473008918200).

Almost surely, 2^{20440355525500} is an apocalyptic number.

20440355525500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20440355525500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22704428073600).

20440355525500 is an abundant number, since it is smaller than the sum of its proper divisors (24968500621700).

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

20440355525500 is a wasteful number, since it uses less digits than its factorization.

20440355525500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521288 (or 521276 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 40.

The spelling of 20440355525500 in words is "twenty trillion, four hundred forty billion, three hundred fifty-five million, five hundred twenty-five thousand, five hundred".