20563250 has 32 divisors (see below), whose sum is σ = 38997504. Its totient is φ = 8118000.

The previous prime is 20563237. The next prime is 20563259. The reversal of 20563250 is 5236502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20563259) 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, 20255 + ... + 21245.

It is an arithmetic number, because the mean of its divisors is an integer number (1218672).

Almost surely, 2^20563250 is an apocalyptic number.

20563250 is a deficient number, since it is larger than the sum of its proper divisors (18434254).

20563250 is an equidigital number, since it uses as much as digits as its factorization.

20563250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20563250 is about 4534.6719837272. The cubic root of 20563250 is about 273.9663677263.

Adding to 20563250 its reverse (5236502), we get a palindrome (25799752).

The spelling of 20563250 in words is "twenty million, five hundred sixty-three thousand, two hundred fifty".