20243446 has 4 divisors (see below), whose sum is σ = 30365172. Its totient is φ = 10121722.

The previous prime is 20243407. The next prime is 20243467. The reversal of 20243446 is 64434202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20243446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060860 + ... + 5060863.

It is an arithmetic number, because the mean of its divisors is an integer number (7591293).

Almost surely, 2^20243446 is an apocalyptic number.

20243446 is a deficient number, since it is larger than the sum of its proper divisors (10121726).

20243446 is a wasteful number, since it uses less digits than its factorization.

20243446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10121725.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 20243446 is about 4499.2717188452. The cubic root of 20243446 is about 272.5386798052.

Adding to 20243446 its reverse (64434202), we get a palindrome (84677648).

The spelling of 20243446 in words is "twenty million, two hundred forty-three thousand, four hundred forty-six".