20907241 has 4 divisors (see below), whose sum is σ = 20919184. Its totient is φ = 20895300.

The previous prime is 20907221. The next prime is 20907247. The reversal of 20907241 is 14270902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20907241 - 2¹¹ = 20905193 is a prime.

It is a super-3 number, since 3×20907241³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20907247) 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, 2775 + ... + 7036.

It is an arithmetic number, because the mean of its divisors is an integer number (5229796).

Almost surely, 2^20907241 is an apocalyptic number.

It is an amenable number.

20907241 is a deficient number, since it is larger than the sum of its proper divisors (11943).

20907241 is an equidigital number, since it uses as much as digits as its factorization.

20907241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11942.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20907241 is about 4572.4436573893. The cubic root of 20907241 is about 275.4856037089.

The spelling of 20907241 in words is "twenty million, nine hundred seven thousand, two hundred forty-one".