20093231 has 2 divisors, whose sum is σ = 20093232. Its totient is φ = 20093230.

The previous prime is 20093219. The next prime is 20093251. The reversal of 20093231 is 13239002.

It is an a-pointer prime, because the next prime (20093251) can be obtained adding 20093231 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20093231 - 2¹⁸ = 19831087 is a prime.

It is a super-2 number, since 2×20093231² = 807475864038722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20093251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10046615 + 10046616.

It is an arithmetic number, because the mean of its divisors is an integer number (10046616).

Almost surely, 2^20093231 is an apocalyptic number.

20093231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20093231 is an equidigital number, since it uses as much as digits as its factorization.

20093231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20093231 is about 4482.5473784445. The cubic root of 20093231 is about 271.8628877504.

The spelling of 20093231 in words is "twenty million, ninety-three thousand, two hundred thirty-one".