20502241 has 4 divisors (see below), whose sum is σ = 20534292. Its totient is φ = 20470192.

The previous prime is 20502233. The next prime is 20502247. The reversal of 20502241 is 14220502.

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 6656400 + 13845841 = 2580^2 + 3721^2 .

It is a cyclic number.

It is not a de Polignac number, because 20502241 - 2³ = 20502233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20502247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15046 + ... + 16351.

It is an arithmetic number, because the mean of its divisors is an integer number (5133573).

Almost surely, 2^20502241 is an apocalyptic number.

It is an amenable number.

20502241 is a deficient number, since it is larger than the sum of its proper divisors (32051).

20502241 is an equidigital number, since it uses as much as digits as its factorization.

20502241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32050.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20502241 is about 4527.9400393556. The cubic root of 20502241 is about 273.6951561976.

Adding to 20502241 its reverse (14220502), we get a palindrome (34722743).

The spelling of 20502241 in words is "twenty million, five hundred two thousand, two hundred forty-one".