20563753960 has 64 divisors (see below), whose sum is σ = 49739961600. Its totient is φ = 7626767616.

The previous prime is 20563753949. The next prime is 20563753963. The reversal of 20563753960 is 6935736502.

It is a self number, because there is not a number n which added to its sum of digits gives 20563753960.

It is not an unprimeable number, because it can be changed into a prime (20563753963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252127 + ... + 323566.

It is an arithmetic number, because the mean of its divisors is an integer number (777186900).

Almost surely, 2^20563753960 is an apocalyptic number.

20563753960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20563753960 is an abundant number, since it is smaller than the sum of its proper divisors (29176207640).

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

20563753960 is a wasteful number, since it uses less digits than its factorization.

20563753960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575770 (or 575766 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 46.

The spelling of 20563753960 in words is "twenty billion, five hundred sixty-three million, seven hundred fifty-three thousand, nine hundred sixty".