20530505050 has 48 divisors (see below), whose sum is σ = 43094786400. Its totient is φ = 7208196800.

The previous prime is 20530505041. The next prime is 20530505057. The reversal of 20530505050 is 5050503502.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20530505057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 627640 + ... + 659539.

It is an arithmetic number, because the mean of its divisors is an integer number (897808050).

Almost surely, 2^20530505050 is an apocalyptic number.

20530505050 is an abundant number, since it is smaller than the sum of its proper divisors (22564281350).

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

20530505050 is a wasteful number, since it uses less digits than its factorization.

20530505050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287231 (or 1287226 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 25.

The spelling of 20530505050 in words is "twenty billion, five hundred thirty million, five hundred five thousand, fifty".