20727241 has 4 divisors (see below), whose sum is σ = 20866500. Its totient is φ = 20587984.

The previous prime is 20727227. The next prime is 20727253. The reversal of 20727241 is 14272702.

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 11363641 + 9363600 = 3371^2 + 3060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20727241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20727281) 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, 69406 + ... + 69703.

It is an arithmetic number, because the mean of its divisors is an integer number (5216625).

Almost surely, 2^20727241 is an apocalyptic number.

It is an amenable number.

20727241 is a deficient number, since it is larger than the sum of its proper divisors (139259).

20727241 is a wasteful number, since it uses less digits than its factorization.

20727241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139258.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 20727241 is about 4552.7179794053. The cubic root of 20727241 is about 274.6927300795.

Adding to 20727241 its reverse (14272702), we get a palindrome (34999943).

The spelling of 20727241 in words is "twenty million, seven hundred twenty-seven thousand, two hundred forty-one".