20704250 has 32 divisors (see below), whose sum is σ = 44299008. Its totient is φ = 7098000.

The previous prime is 20704219. The next prime is 20704253. The reversal of 20704250 is 5240702.

It is not an unprimeable number, because it can be changed into a prime (20704253) 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, 4166 + ... + 7665.

It is an arithmetic number, because the mean of its divisors is an integer number (1384344).

Almost surely, 2^20704250 is an apocalyptic number.

20704250 is an abundant number, since it is smaller than the sum of its proper divisors (23594758).

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

20704250 is a wasteful number, since it uses less digits than its factorization.

20704250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11855 (or 11845 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20704250 is about 4550.1923036285. The cubic root of 20704250 is about 274.5911279244.

Adding to 20704250 its reverse (5240702), we get a palindrome (25944952).

The spelling of 20704250 in words is "twenty million, seven hundred four thousand, two hundred fifty".