20440360536 has 64 divisors (see below), whose sum is σ = 52967278080. Its totient is φ = 6568932480.

The previous prime is 20440360517. The next prime is 20440360559. The reversal of 20440360536 is 63506304402.

It is a junction number, because it is equal to n+sod(n) for n = 20440360497 and 20440360506.

It is a congruent number.

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, 59655 + ... + 210806.

It is an arithmetic number, because the mean of its divisors is an integer number (827613720).

Almost surely, 2^20440360536 is an apocalyptic number.

It is an amenable number.

20440360536 is an abundant number, since it is smaller than the sum of its proper divisors (32526917544).

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

20440360536 is a wasteful number, since it uses less digits than its factorization.

20440360536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270584 (or 270580 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 20440360536 its reverse (63506304402), we get a palindrome (83946664938).

The spelling of 20440360536 in words is "twenty billion, four hundred forty million, three hundred sixty thousand, five hundred thirty-six".