20970241 has 4 divisors (see below), whose sum is σ = 20979412. Its totient is φ = 20961072.

The previous prime is 20970223. The next prime is 20970247. The reversal of 20970241 is 14207902.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19395216 + 1575025 = 4404^2 + 1255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20970241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20970247) 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, 1951 + ... + 6763.

It is an arithmetic number, because the mean of its divisors is an integer number (5244853).

Almost surely, 2^20970241 is an apocalyptic number.

It is an amenable number.

20970241 is a deficient number, since it is larger than the sum of its proper divisors (9171).

20970241 is an equidigital number, since it uses as much as digits as its factorization.

20970241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9170.

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

The square root of 20970241 is about 4579.3275707248. The cubic root of 20970241 is about 275.7620340863.

The spelling of 20970241 in words is "twenty million, nine hundred seventy thousand, two hundred forty-one".