20741161 has 6 divisors (see below), whose sum is σ = 24127530. Its totient is φ = 17778096.

The previous prime is 20741153. The next prime is 20741167. The reversal of 20741161 is 16114702.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 670761 = 4480^2 + 819^2 .

It is not a de Polignac number, because 20741161 - 2³ = 20741153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20741167) 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 5 ways as a sum of consecutive naturals, for example, 211596 + ... + 211693.

It is an arithmetic number, because the mean of its divisors is an integer number (4021255).

Almost surely, 2^20741161 is an apocalyptic number.

It is an amenable number.

20741161 is a deficient number, since it is larger than the sum of its proper divisors (3386369).

20741161 is an equidigital number, since it uses as much as digits as its factorization.

20741161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423303 (or 423296 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 20741161 is about 4554.2464799350. The cubic root of 20741161 is about 274.7542090312.

Adding to 20741161 its reverse (16114702), we get a palindrome (36855863).

It can be divided in two parts, 20741 and 161, that added together give a palindrome (20902).

The spelling of 20741161 in words is "twenty million, seven hundred forty-one thousand, one hundred sixty-one".