20243443 has 4 divisors (see below), whose sum is σ = 22083768. Its totient is φ = 18403120.

The previous prime is 20243407. The next prime is 20243467. The reversal of 20243443 is 34434202.

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 20243443 - 2¹³ = 20235251 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20243143) 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, 920146 + ... + 920167.

It is an arithmetic number, because the mean of its divisors is an integer number (5520942).

Almost surely, 2^20243443 is an apocalyptic number.

20243443 is a deficient number, since it is larger than the sum of its proper divisors (1840325).

20243443 is a wasteful number, since it uses less digits than its factorization.

20243443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840324.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 20243443 is about 4499.2713854579. The cubic root of 20243443 is about 272.5386663422.

Adding to 20243443 its reverse (34434202), we get a palindrome (54677645).

The spelling of 20243443 in words is "twenty million, two hundred forty-three thousand, four hundred forty-three".