20654245 has 4 divisors (see below), whose sum is σ = 24785100. Its totient is φ = 16523392.

The previous prime is 20654243. The next prime is 20654261. The reversal of 20654245 is 54245602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2455489 + 18198756 = 1567^2 + 4266^2 .

It is a cyclic number.

It is not a de Polignac number, because 20654245 - 2¹ = 20654243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20654243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2065420 + ... + 2065429.

It is an arithmetic number, because the mean of its divisors is an integer number (6196275).

Almost surely, 2^20654245 is an apocalyptic number.

It is an amenable number.

20654245 is a deficient number, since it is larger than the sum of its proper divisors (4130855).

20654245 is an equidigital number, since it uses as much as digits as its factorization.

20654245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130854.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 20654245 is about 4544.6941591267. The cubic root of 20654245 is about 274.3698851273.

Adding to 20654245 its reverse (54245602), we get a palindrome (74899847).

The spelling of 20654245 in words is "twenty million, six hundred fifty-four thousand, two hundred forty-five".