20237443 has 4 divisors (see below), whose sum is σ = 20464920. Its totient is φ = 20009968.

The previous prime is 20237431. The next prime is 20237449. The reversal of 20237443 is 34473202.

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 20237443 - 2⁵ = 20237411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20237449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113605 + ... + 113782.

It is an arithmetic number, because the mean of its divisors is an integer number (5116230).

Almost surely, 2^20237443 is an apocalyptic number.

20237443 is a deficient number, since it is larger than the sum of its proper divisors (227477).

20237443 is an equidigital number, since it uses as much as digits as its factorization.

20237443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227476.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 20237443 is about 4498.6045614168. The cubic root of 20237443 is about 272.5117375636.

The spelling of 20237443 in words is "twenty million, two hundred thirty-seven thousand, four hundred forty-three".