20633243 has 4 divisors (see below), whose sum is σ = 20644800. Its totient is φ = 20621688.

The previous prime is 20633237. The next prime is 20633279. The reversal of 20633243 is 34233602.

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 is a cyclic number.

It is not a de Polignac number, because 20633243 - 2¹⁶ = 20567707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20633443) 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, 2468 + ... + 6881.

It is an arithmetic number, because the mean of its divisors is an integer number (5161200).

Almost surely, 2^20633243 is an apocalyptic number.

20633243 is a deficient number, since it is larger than the sum of its proper divisors (11557).

20633243 is an equidigital number, since it uses as much as digits as its factorization.

20633243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11556.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 20633243 is about 4542.3829649205. The cubic root of 20633243 is about 274.2768571074.

Adding to 20633243 its reverse (34233602), we get a palindrome (54866845).

The spelling of 20633243 in words is "twenty million, six hundred thirty-three thousand, two hundred forty-three".