20441243 has 4 divisors (see below), whose sum is σ = 20571600. Its totient is φ = 20310888.

The previous prime is 20441233. The next prime is 20441249. The reversal of 20441243 is 34214402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20441243 - 2²² = 16246939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20441249) 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, 64943 + ... + 65256.

It is an arithmetic number, because the mean of its divisors is an integer number (5142900).

Almost surely, 2^20441243 is an apocalyptic number.

20441243 is a deficient number, since it is larger than the sum of its proper divisors (130357).

20441243 is a wasteful number, since it uses less digits than its factorization.

20441243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130356.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20441243 is about 4521.1992877996. The cubic root of 20441243 is about 273.4234551458.

Adding to 20441243 its reverse (34214402), we get a palindrome (54655645).

The spelling of 20441243 in words is "twenty million, four hundred forty-one thousand, two hundred forty-three".