20563220250 has 256 divisors, whose sum is σ = 60383232000. Its totient is φ = 5164430400.

The previous prime is 20563220243. The next prime is 20563220267. The reversal of 20563220250 is 5202236502.

20563220250 is a `hidden beast` number, since 2 + 0 + 5 + 632 + 2 + 0 + 25 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28599391 + ... + 28600109.

It is an arithmetic number, because the mean of its divisors is an integer number (235872000).

Almost surely, 2^20563220250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20563220250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30191616000).

20563220250 is an abundant number, since it is smaller than the sum of its proper divisors (39820011750).

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

20563220250 is a wasteful number, since it uses less digits than its factorization.

20563220250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 20563220250 its reverse (5202236502), we get a palindrome (25765456752).

The spelling of 20563220250 in words is "twenty billion, five hundred sixty-three million, two hundred twenty thousand, two hundred fifty".