20053231 has 4 divisors (see below), whose sum is σ = 21876264. Its totient is φ = 18230200.

The previous prime is 20053211. The next prime is 20053237. The reversal of 20053231 is 13235002.

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 20053231 - 2⁹ = 20052719 is a prime.

It is a super-2 number, since 2×20053231² = 804264147078722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20053237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911500 + ... + 911521.

It is an arithmetic number, because the mean of its divisors is an integer number (5469066).

Almost surely, 2^20053231 is an apocalyptic number.

20053231 is a deficient number, since it is larger than the sum of its proper divisors (1823033).

20053231 is a wasteful number, since it uses less digits than its factorization.

20053231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823032.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20053231 is about 4478.0834069946. The cubic root of 20053231 is about 271.6823669315.

Adding to 20053231 its reverse (13235002), we get a palindrome (33288233).

The spelling of 20053231 in words is "twenty million, fifty-three thousand, two hundred thirty-one".