20500244 has 6 divisors (see below), whose sum is σ = 35875434. Its totient is φ = 10250120.

The previous prime is 20500231. The next prime is 20500247. The reversal of 20500244 is 44200502.

It can be written as a sum of positive squares in only one way, i.e., 10640644 + 9859600 = 3262^2 + 3140^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2562527 + ... + 2562534.

It is an arithmetic number, because the mean of its divisors is an integer number (5979239).

Almost surely, 2^20500244 is an apocalyptic number.

It is an amenable number.

20500244 is a deficient number, since it is larger than the sum of its proper divisors (15375190).

20500244 is a wasteful number, since it uses less digits than its factorization.

20500244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125065 (or 5125063 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20500244 is about 4527.7195142809. The cubic root of 20500244 is about 273.6862695760.

Adding to 20500244 its reverse (44200502), we get a palindrome (64700746).

The spelling of 20500244 in words is "twenty million, five hundred thousand, two hundred forty-four".