20331243 has 10 divisors (see below), whose sum is σ = 30371484. Its totient is φ = 13554108.

The previous prime is 20331209. The next prime is 20331253. The reversal of 20331243 is 34213302.

It is not a de Polignac number, because 20331243 - 2⁹ = 20330731 is a prime.

It is a super-3 number, since 3×20331243³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20331253) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125421 + ... + 125582.

Almost surely, 2^20331243 is an apocalyptic number.

20331243 is a deficient number, since it is larger than the sum of its proper divisors (10040241).

20331243 is an equidigital number, since it uses as much as digits as its factorization.

20331243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251015 (or 251006 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20331243 is about 4509.0179640361. The cubic root of 20331243 is about 272.9321169221.

Adding to 20331243 its reverse (34213302), we get a palindrome (54544545).

The spelling of 20331243 in words is "twenty million, three hundred thirty-one thousand, two hundred forty-three".