20440155552 has 48 divisors (see below), whose sum is σ = 53736994080. Its totient is φ = 6803025152.

The previous prime is 20440155551. The next prime is 20440155557. The reversal of 20440155552 is 25555104402.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (20440155551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98283 + ... + 224810.

It is an arithmetic number, because the mean of its divisors is an integer number (1119520710).

Almost surely, 2^20440155552 is an apocalyptic number.

It is an amenable number.

20440155552 is an abundant number, since it is smaller than the sum of its proper divisors (33296838528).

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

20440155552 is a wasteful number, since it uses less digits than its factorization.

20440155552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323765 (or 323757 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 33.

Adding to 20440155552 its reverse (25555104402), we get a palindrome (45995259954).

The spelling of 20440155552 in words is "twenty billion, four hundred forty million, one hundred fifty-five thousand, five hundred fifty-two".